文章
Dummer. ゛☀
2017年07月14日
Family - Rhamnaceae
Stems - To +75cm tall, multiple from base, branching, woody, erect, dense pubescent with a mix of longer and shorter hairs above, puberulent to glabrous below.
Leaves - Alternate, petiolate. Petiole to 6mm long, dense pubescent. Blade ovate to oblong-ovate, crenate-serrate, acute, rugose above, soft pubescent, (more so below), to +6cm long, +4cm broad.
Inflorescence - Axillary panicles on long peduncles. Peduncles to 6cm long, dense pubescent, longer than subtending leaf. Panicle to 4cm long(tall), subcylindric. Pedicels white, glabrous, expanded at apex below calyx, to 6mm long.
Flowers - Petals 5, white, spreading, clawed. Claw to 1mm long. Limb cupped or folded, tuberculate externally, .8mm long. Stamens 5, opposite the petals, erect. Filaments to 1mm long, whitish with a purple tinge, glabrous. Anthers purplish. Style .2mm long, 3-lobed. Ovary surrounded by a purple nectary ring, 3-locular. Hypanthium 1mm long, white, persistent in fruit. Calyx lobes inflexed, acute, ciliate margined, 1mm long, deciduous. Fruit a 3-lobed capsule, deep purple to black, 4-5mm broad. Seeds 1 per carpel.
Flowering - May - November.
Habitat - Prairies, glades, open woods, thickets, railroads.
Origin - Native to U.S.
Other info. - This is a common and easy to identify plant in Missouri. The showy flower heads are easy to spot from a distance and the fruits are unmistakable.
Steyermark gives two varieties for the state. Variety pitcheri T.&G. is described above. A rare variety, var. intermedius (Pursh) K. Koch, has smaller leaves which are glabrous above and only slightly pubescent below. This latter variety is only found in a couple of counties in the eastern portion of the state.
Another species, C. ovatus Desf., resembles C. americanus, but the former has peduncles which typically do not exceed the subtending leaf, leaves which are oblong-lanceolate to narrowly elliptic, and flower clusters which are more globose in shape. You can find C. ovatus in this same section of this website. The fruit picture above is actually of C. ovatus but they (the fruits) are practically identical.
C. americanus is a popular medicinal plant. The roots and leaves were boiled into tea and used for treating everything from snake bites to whooping cough. The roots contain alkaloids which lower blood pressure.
Stems - To +75cm tall, multiple from base, branching, woody, erect, dense pubescent with a mix of longer and shorter hairs above, puberulent to glabrous below.
Leaves - Alternate, petiolate. Petiole to 6mm long, dense pubescent. Blade ovate to oblong-ovate, crenate-serrate, acute, rugose above, soft pubescent, (more so below), to +6cm long, +4cm broad.
Inflorescence - Axillary panicles on long peduncles. Peduncles to 6cm long, dense pubescent, longer than subtending leaf. Panicle to 4cm long(tall), subcylindric. Pedicels white, glabrous, expanded at apex below calyx, to 6mm long.
Flowers - Petals 5, white, spreading, clawed. Claw to 1mm long. Limb cupped or folded, tuberculate externally, .8mm long. Stamens 5, opposite the petals, erect. Filaments to 1mm long, whitish with a purple tinge, glabrous. Anthers purplish. Style .2mm long, 3-lobed. Ovary surrounded by a purple nectary ring, 3-locular. Hypanthium 1mm long, white, persistent in fruit. Calyx lobes inflexed, acute, ciliate margined, 1mm long, deciduous. Fruit a 3-lobed capsule, deep purple to black, 4-5mm broad. Seeds 1 per carpel.
Flowering - May - November.
Habitat - Prairies, glades, open woods, thickets, railroads.
Origin - Native to U.S.
Other info. - This is a common and easy to identify plant in Missouri. The showy flower heads are easy to spot from a distance and the fruits are unmistakable.
Steyermark gives two varieties for the state. Variety pitcheri T.&G. is described above. A rare variety, var. intermedius (Pursh) K. Koch, has smaller leaves which are glabrous above and only slightly pubescent below. This latter variety is only found in a couple of counties in the eastern portion of the state.
Another species, C. ovatus Desf., resembles C. americanus, but the former has peduncles which typically do not exceed the subtending leaf, leaves which are oblong-lanceolate to narrowly elliptic, and flower clusters which are more globose in shape. You can find C. ovatus in this same section of this website. The fruit picture above is actually of C. ovatus but they (the fruits) are practically identical.
C. americanus is a popular medicinal plant. The roots and leaves were boiled into tea and used for treating everything from snake bites to whooping cough. The roots contain alkaloids which lower blood pressure.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Brassicaceae
Stems - To +40cm tall, erect, herbaceous, typically multiple from base, from thick taproot, typically simple but branching in inflorescence, densely retrorse puberulent below, sparse puberulent above, ribbed from decurrent leaf tissue.
Leaves - Alternate, sessile, oblong to lanceolate or ovate, to +6.5cm long, 3cm broad, reduced above, dentate to serrate, slightly undulate, clasping, auriculate, acute, densely pubescent. Auricles rounded or pointed, +/-7mm long.
Inflorescence - Multiple terminal racemes in a terminal corymbose arrangement. Pedicels filiform, expanding in fruit to +/-1.5cm long, glabrous.
Flowers - Petals 4, white, free, clawed, glabrous, typically spreading, to +/-3mm long. Limb rotund to broadly obovate, +1.5m in diameter. Stamens 6, erect to spreading. Filaments +/-3mm long, white, glabrous. Anthers yellow-orange, .5mm long. Nectaries present at base of stamens and surrounding ovary. Style 1mm long, yellowish-green. Stigma capitate, globose. Ovary superior, compressed, ovoid, yellowish-green, glabrous, 1.8mm long in flower. Sepals 4, free, whitish-green with broad scarious margins, to 2mm long, 2mm broad at apex, obovate to spatulate. Silicles to 3mm long, +3mm broad, cordate.
Flowering - April - June.
Habitat - Waste ground, slopes, roadsides, railroads.
Origin - Native to Europe.
Other info. - Still another introduced member of the Brassicaceae. This species is becoming common in Missouri but is not found throughout the state yet. The plant is easy to ID in the field because of its clasping dentate leaves and crowded, mostly flat-topped, inflorescences. Large colonies of this species can occur when the plants are left undisturbed.
Stems - To +40cm tall, erect, herbaceous, typically multiple from base, from thick taproot, typically simple but branching in inflorescence, densely retrorse puberulent below, sparse puberulent above, ribbed from decurrent leaf tissue.
Leaves - Alternate, sessile, oblong to lanceolate or ovate, to +6.5cm long, 3cm broad, reduced above, dentate to serrate, slightly undulate, clasping, auriculate, acute, densely pubescent. Auricles rounded or pointed, +/-7mm long.
Inflorescence - Multiple terminal racemes in a terminal corymbose arrangement. Pedicels filiform, expanding in fruit to +/-1.5cm long, glabrous.
Flowers - Petals 4, white, free, clawed, glabrous, typically spreading, to +/-3mm long. Limb rotund to broadly obovate, +1.5m in diameter. Stamens 6, erect to spreading. Filaments +/-3mm long, white, glabrous. Anthers yellow-orange, .5mm long. Nectaries present at base of stamens and surrounding ovary. Style 1mm long, yellowish-green. Stigma capitate, globose. Ovary superior, compressed, ovoid, yellowish-green, glabrous, 1.8mm long in flower. Sepals 4, free, whitish-green with broad scarious margins, to 2mm long, 2mm broad at apex, obovate to spatulate. Silicles to 3mm long, +3mm broad, cordate.
Flowering - April - June.
Habitat - Waste ground, slopes, roadsides, railroads.
Origin - Native to Europe.
Other info. - Still another introduced member of the Brassicaceae. This species is becoming common in Missouri but is not found throughout the state yet. The plant is easy to ID in the field because of its clasping dentate leaves and crowded, mostly flat-topped, inflorescences. Large colonies of this species can occur when the plants are left undisturbed.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Brassicaceae
Stems - To 30cm tall, erect, herbaceous, from a weak taproot, multiple from the base, green, purple in strong sun, branching, mostly glabrous but with a few retrorse or spreading hairs near the base, terete or angled.
Leaves - Basal leaves few, no rosette present, alternate, petiolate. The largest leaves to +10cm long, 3cm broad, pinnate, with 2-3 pairs of lateral leaflets. Terminal leaflet broader than long on the lowest leaves and becoming more narrow in upper leaves, typically somewhat 3-lobed. All leaflets glabrous, with 3 main veins from the base of the blade (veins visible abaxially). Upper leaves with more lateral leaflets than lower leaves. Leaflets oblanceolate to oblong, entire or with 1-2 lobes, blunt at the tip or with a minute mucro.
Inflorescence - Terminal raceme, compact in flower, quickly elongating in fruit, to +10cm long. Pedicels to 4mm long in flower, to 6mm long in fruit, ascending, glabrous. Axis of inflorescence glabrous.
Flowers - Petals 4, white, glabrous, spreading. Stamens 6, erect. Sepals 4, green, glabrous, with slightly scarious margins, to 1.7mm long, 1mm broad, cupped. Siliques to 2cm long, glabrous, terete, slightly beaked (the beak to 1mm long), many-seeded, elastically dehiscent, 2-valved, erect.
Flowering - March - July.
Habitat - Low wet woods, spring branches, base of moist bluffs.
Origin - Native to U.S.
Other info. - This little species can be found mostly in the lower 2/3 of Missouri in the habitats mentioned above. This species nd another, C. parviflora L., can be difficult to distinguish. The two plants grow in different habitats. C. pensylvanica grows in moist to wet soils of low areas and C. parviflora prefers drier soils of upland areas. Both plants can be eaten raw or cooked as greens.
Stems - To 30cm tall, erect, herbaceous, from a weak taproot, multiple from the base, green, purple in strong sun, branching, mostly glabrous but with a few retrorse or spreading hairs near the base, terete or angled.
Leaves - Basal leaves few, no rosette present, alternate, petiolate. The largest leaves to +10cm long, 3cm broad, pinnate, with 2-3 pairs of lateral leaflets. Terminal leaflet broader than long on the lowest leaves and becoming more narrow in upper leaves, typically somewhat 3-lobed. All leaflets glabrous, with 3 main veins from the base of the blade (veins visible abaxially). Upper leaves with more lateral leaflets than lower leaves. Leaflets oblanceolate to oblong, entire or with 1-2 lobes, blunt at the tip or with a minute mucro.
Inflorescence - Terminal raceme, compact in flower, quickly elongating in fruit, to +10cm long. Pedicels to 4mm long in flower, to 6mm long in fruit, ascending, glabrous. Axis of inflorescence glabrous.
Flowers - Petals 4, white, glabrous, spreading. Stamens 6, erect. Sepals 4, green, glabrous, with slightly scarious margins, to 1.7mm long, 1mm broad, cupped. Siliques to 2cm long, glabrous, terete, slightly beaked (the beak to 1mm long), many-seeded, elastically dehiscent, 2-valved, erect.
Flowering - March - July.
Habitat - Low wet woods, spring branches, base of moist bluffs.
Origin - Native to U.S.
Other info. - This little species can be found mostly in the lower 2/3 of Missouri in the habitats mentioned above. This species nd another, C. parviflora L., can be difficult to distinguish. The two plants grow in different habitats. C. pensylvanica grows in moist to wet soils of low areas and C. parviflora prefers drier soils of upland areas. Both plants can be eaten raw or cooked as greens.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Brassicaceae
Stems - Glabrous, green or sometimes purplish in strong sun, to +40cm tall, terete, from a taproot, typically multiple from the base, erect, herbaceous, typically simple.
Flowering - March - April.
Habitat - Waste ground, disturbed sites, roadsides, lawns, fields, railroads.
Origin - Native to Europe.
Other info. - This introduced species can be found scattered in Missouri and the plant is becoming much more common.
Many members of the genus Cardamine can be hard to distinguish in the field. C. hirsuta can be identified by its many basal leaves, glabrous stems, and basal leaf petioles - which have hirsute hairs at the base. The basal leaves of this species dry and wilt as the plant matures so it is best identified while young.
C. hirsuta can flower when quite small. The picture below shows a tiny plant typical of how the species looks in an area that gets mowed or has poor soil.
Stems - Glabrous, green or sometimes purplish in strong sun, to +40cm tall, terete, from a taproot, typically multiple from the base, erect, herbaceous, typically simple.
Flowering - March - April.
Habitat - Waste ground, disturbed sites, roadsides, lawns, fields, railroads.
Origin - Native to Europe.
Other info. - This introduced species can be found scattered in Missouri and the plant is becoming much more common.
Many members of the genus Cardamine can be hard to distinguish in the field. C. hirsuta can be identified by its many basal leaves, glabrous stems, and basal leaf petioles - which have hirsute hairs at the base. The basal leaves of this species dry and wilt as the plant matures so it is best identified while young.
C. hirsuta can flower when quite small. The picture below shows a tiny plant typical of how the species looks in an area that gets mowed or has poor soil.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Brassicaceae
Stems - To +40cm tall, erect, herbaceous, terete, hispidulous (mainly in the basal half), green, purplish at the base, simple to 1-2 branched in the apical half, from a short knotty rhizome.
Leaves - Alternate, petiolate below, becoming sessile above. Basal leaves on petioles to +8cm long. Petioles glabrous to hipidulous, flattened. Blades reniform to broadly ovate, glabrous, with wavy margins, +5cm long and broad. Cauline leaves becoming sessile or short petiolate, few (1-5), ovate to lanceolate, with a few coarse teeth, glabrous, light green below (abaxially), deep dull green above, with sparse ciliolate margins or not.
Flowers - Flowers not seen. Siliques to 3cm long, 2cm broad, glabrous, with a beak to 4mm long, 2-valved, with a small constriction between the seeds.
Flowering - March - April.
Habitat - Low or swampy woodlands.
Origin - Native to U.S.
Other info. - This attractive species can be found mainly in the northern half of Missouri in a handful of counties. The plant can be identified by its reniform basal leaf blades, few, sessile or nearly sessile cauline leaves, and big flowers. The flowers are typically purple but the plants photographed in Columbia, MO., had white flowers.
Stems - To +40cm tall, erect, herbaceous, terete, hispidulous (mainly in the basal half), green, purplish at the base, simple to 1-2 branched in the apical half, from a short knotty rhizome.
Leaves - Alternate, petiolate below, becoming sessile above. Basal leaves on petioles to +8cm long. Petioles glabrous to hipidulous, flattened. Blades reniform to broadly ovate, glabrous, with wavy margins, +5cm long and broad. Cauline leaves becoming sessile or short petiolate, few (1-5), ovate to lanceolate, with a few coarse teeth, glabrous, light green below (abaxially), deep dull green above, with sparse ciliolate margins or not.
Flowers - Flowers not seen. Siliques to 3cm long, 2cm broad, glabrous, with a beak to 4mm long, 2-valved, with a small constriction between the seeds.
Flowering - March - April.
Habitat - Low or swampy woodlands.
Origin - Native to U.S.
Other info. - This attractive species can be found mainly in the northern half of Missouri in a handful of counties. The plant can be identified by its reniform basal leaf blades, few, sessile or nearly sessile cauline leaves, and big flowers. The flowers are typically purple but the plants photographed in Columbia, MO., had white flowers.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Brassicaceae
Stems - Erect, herbaceous, from a knobby caudex and fibrous roots, glabrous to sparse hispidulous, green apically, purplish near the base, branching above or simple, to +40cm tall.
Leaves - Alternate. Basal leaves petiolate, typically purplish abaxially. Petioles to +7cm long. Blades ovate, glabrous, with undulate margins, tapering at the base or truncate, to 5cm long, 2.5-3cm broad. Cauline leaves becoming sessile or short petiolate, with a few coarse teeth or entire, lanceolate to oblong-lanceolate.
Flowers - Petals 4, tapering to the base, to +1.2cm long, 4-5mm broad, white, glabrous, rounded at the apex. Stamens 6, erect. Filaments white, 5-6mm long. Anthers 1.3mm long, pale yellow. Ovary terete, 5mm long, glabrous, yellow-green. Style 1.2mm long. Stigma capitate. Sepals 4, to 4mm long, 1.5mm broad, green, glabrous, with slightly involute margins, oblong-lanceolate, with scarious margins, erect.
Flowering - March - June.
Habitat - Low wet woods, spring branches, wet meadows, pond margins, moist ledges of bluffs.
Origin - Native to U.S.
Other info. - This species can be found basically in the southeastern 1/2 of Missouri. The plant likes to be in or near water and is easily identified by its rather large white flowers.
Traditionally the leaves of this species were eaten in salads and add a sharp peppery taste, much like fresh cabbage.
Stems - Erect, herbaceous, from a knobby caudex and fibrous roots, glabrous to sparse hispidulous, green apically, purplish near the base, branching above or simple, to +40cm tall.
Leaves - Alternate. Basal leaves petiolate, typically purplish abaxially. Petioles to +7cm long. Blades ovate, glabrous, with undulate margins, tapering at the base or truncate, to 5cm long, 2.5-3cm broad. Cauline leaves becoming sessile or short petiolate, with a few coarse teeth or entire, lanceolate to oblong-lanceolate.
Flowers - Petals 4, tapering to the base, to +1.2cm long, 4-5mm broad, white, glabrous, rounded at the apex. Stamens 6, erect. Filaments white, 5-6mm long. Anthers 1.3mm long, pale yellow. Ovary terete, 5mm long, glabrous, yellow-green. Style 1.2mm long. Stigma capitate. Sepals 4, to 4mm long, 1.5mm broad, green, glabrous, with slightly involute margins, oblong-lanceolate, with scarious margins, erect.
Flowering - March - June.
Habitat - Low wet woods, spring branches, wet meadows, pond margins, moist ledges of bluffs.
Origin - Native to U.S.
Other info. - This species can be found basically in the southeastern 1/2 of Missouri. The plant likes to be in or near water and is easily identified by its rather large white flowers.
Traditionally the leaves of this species were eaten in salads and add a sharp peppery taste, much like fresh cabbage.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Brassicaceae
Stems - To +50cm tall but typically less, herbaceous, erect, stellate pubescent, simple or branching, with a fairly large taproot.
Leaves - Basal leaves pinnatifid, petiolate, to 10cm long, stellate pubescent. Lobes bristle-margined, minutely toothed. Cauline leaves auriculate-clasping, linear-lanceolate, minutely toothed to entire, stellate pubescent, reduced upward. Auricles pointed.
Inflorescence - A terminal raceme to +25cm long(tall). Pedicels spreading, 1-2cm long.Flowers - Corolla 3-4mm broad. Petals 4, white, +/-2mm long, free. Stamens 6, attached at base of ovary. Style 1, very short. Sepals 4, free, green, glabrous, 2mm long, oblong.
Fruit - Obcordate (or triangular) silicle to +3mm long, notched or truncate at apex.Flowering - March - November.
Habitat - Waste ground, disturbed sites, fields, pastures, roadsides, railroads.
Origin - Native to Europe.
Other info. - This plant is one of the most common introduced members of the cabbage family anywhere. The triangular seeds are easily recognized and edible. This is one of the earliest flowering plants in the state. It can be found throughout Missouri.
Stems - To +50cm tall but typically less, herbaceous, erect, stellate pubescent, simple or branching, with a fairly large taproot.
Leaves - Basal leaves pinnatifid, petiolate, to 10cm long, stellate pubescent. Lobes bristle-margined, minutely toothed. Cauline leaves auriculate-clasping, linear-lanceolate, minutely toothed to entire, stellate pubescent, reduced upward. Auricles pointed.
Inflorescence - A terminal raceme to +25cm long(tall). Pedicels spreading, 1-2cm long.Flowers - Corolla 3-4mm broad. Petals 4, white, +/-2mm long, free. Stamens 6, attached at base of ovary. Style 1, very short. Sepals 4, free, green, glabrous, 2mm long, oblong.
Fruit - Obcordate (or triangular) silicle to +3mm long, notched or truncate at apex.Flowering - March - November.
Habitat - Waste ground, disturbed sites, fields, pastures, roadsides, railroads.
Origin - Native to Europe.
Other info. - This plant is one of the most common introduced members of the cabbage family anywhere. The triangular seeds are easily recognized and edible. This is one of the earliest flowering plants in the state. It can be found throughout Missouri.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Liliaceae
Stems - Bulb. Scape to +50cm tall, 3-4mm in diameter, glabrous, single.
Leaves - Basal, linear, +/-1cm broad, +30cm long, glabrous, entire, dull green above, shiny deep green below.
Inflorescence - Indeterminate raceme terminating scape, 15-16cm long (tall), with +/-40 flowers. Flower pedicels subtended by thin bract to +1cm long.
Flowers - Perianth to 2cm broad, rotate, nectariferous. Pedicels to 1cm long, elongating in fruit, glabrous. Tepals to 1cm long, 3-5mm broad, linear-oblong, white with lilac tinge, glabrous. Stamens 6, borne at base of tepals. Filaments 6mm long, glabrous. Anthers yellow, 3mm long, 1.2mm broad. Ovary superior, glabrous, 3mm long, ovoid, with 3 locules, many seeded, placentation axile. Style 3mm long, glabrous, white. Stigma 3-lobed.
Flowering - April - May.
Habitat - Open woods, stream banks, glades, prairies, fields, roadsides.
Origin - Native to U.S.
Other info. - This is a very abundant plant throughout most of the state. It doesn't bloom for very long though so see it while you can.
The perianth is variable in color and I could have placed the plant in the blue flowers section of this site also. I think the perianth is normally more whitish than blue.
Stems - Bulb. Scape to +50cm tall, 3-4mm in diameter, glabrous, single.
Leaves - Basal, linear, +/-1cm broad, +30cm long, glabrous, entire, dull green above, shiny deep green below.
Inflorescence - Indeterminate raceme terminating scape, 15-16cm long (tall), with +/-40 flowers. Flower pedicels subtended by thin bract to +1cm long.
Flowers - Perianth to 2cm broad, rotate, nectariferous. Pedicels to 1cm long, elongating in fruit, glabrous. Tepals to 1cm long, 3-5mm broad, linear-oblong, white with lilac tinge, glabrous. Stamens 6, borne at base of tepals. Filaments 6mm long, glabrous. Anthers yellow, 3mm long, 1.2mm broad. Ovary superior, glabrous, 3mm long, ovoid, with 3 locules, many seeded, placentation axile. Style 3mm long, glabrous, white. Stigma 3-lobed.
Flowering - April - May.
Habitat - Open woods, stream banks, glades, prairies, fields, roadsides.
Origin - Native to U.S.
Other info. - This is a very abundant plant throughout most of the state. It doesn't bloom for very long though so see it while you can.
The perianth is variable in color and I could have placed the plant in the blue flowers section of this site also. I think the perianth is normally more whitish than blue.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Asteraceae
Stems - To +/-80cm tall, glabrous, purplish below, with purple vertical striations, herbaceous, from short caudex with thickened roots, simple, erect.
Leaves - Alternate, glabrous. Basal leaves petiolate. Petioles to 10cm long, slightly winged. Blade tapering at base and winging petiole, ovate, typically entire or shallow toothed, to 15cm long, 7-8cm broad, thickened to semisucculent, with main veins parallel. Cauline leaves strongly reduced, shallow toothed to entire, ovate to ovate-lanceolate.
Inflorescence - Corymbose cyme with many flower heads. Main branches of inflorescence and peduncles whitish, glabrous. Leaves reduced to bracts in inflorescence.
Involucre - To 1cm tall(long), 6mm in diameter. Phyllaries keeled and united, whitish, glabrous. Flower head with typically 5 flowers.
Ray flowers - Absent.
Disk flowers - Corolla 5-lobed, whitish. Corolla tube 8-9mm long, glabrous. Lobes to 3mm long, often recurved or curling. Stamens 5, exserted. Anthers orange to brown, 2.7mm long, connate around style. Style glabrous, bifurcate. Achenes green(in flower), terete, 2mm long in flower, 5mm long in fruit, with 10 ridges(nerves). Pappus of many capillary bristles to 8mm long.
Flowering - May - August.
Habitat - Prairies, wet meadows, glades, rocky open woods, thickets, roadsides, railroads.
Origin - Native to U.S.
Other info. - It's hard to miss this plant as you peer out across a mature prairie. The white flowers and white branches of the inflorescence are sure to catch your eye. The plant is very easy to identify in the field. If you wish to replant a real prairie habitat, you must include this plant.
A common synonym is Cacalia plantaginea (Raf.) Shinners.
Stems - To +/-80cm tall, glabrous, purplish below, with purple vertical striations, herbaceous, from short caudex with thickened roots, simple, erect.
Leaves - Alternate, glabrous. Basal leaves petiolate. Petioles to 10cm long, slightly winged. Blade tapering at base and winging petiole, ovate, typically entire or shallow toothed, to 15cm long, 7-8cm broad, thickened to semisucculent, with main veins parallel. Cauline leaves strongly reduced, shallow toothed to entire, ovate to ovate-lanceolate.
Inflorescence - Corymbose cyme with many flower heads. Main branches of inflorescence and peduncles whitish, glabrous. Leaves reduced to bracts in inflorescence.
Involucre - To 1cm tall(long), 6mm in diameter. Phyllaries keeled and united, whitish, glabrous. Flower head with typically 5 flowers.
Ray flowers - Absent.
Disk flowers - Corolla 5-lobed, whitish. Corolla tube 8-9mm long, glabrous. Lobes to 3mm long, often recurved or curling. Stamens 5, exserted. Anthers orange to brown, 2.7mm long, connate around style. Style glabrous, bifurcate. Achenes green(in flower), terete, 2mm long in flower, 5mm long in fruit, with 10 ridges(nerves). Pappus of many capillary bristles to 8mm long.
Flowering - May - August.
Habitat - Prairies, wet meadows, glades, rocky open woods, thickets, roadsides, railroads.
Origin - Native to U.S.
Other info. - It's hard to miss this plant as you peer out across a mature prairie. The white flowers and white branches of the inflorescence are sure to catch your eye. The plant is very easy to identify in the field. If you wish to replant a real prairie habitat, you must include this plant.
A common synonym is Cacalia plantaginea (Raf.) Shinners.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Asteraceae
Stems - Single or multiple from base, erect, herbaceous but stout, mostly simple, to 1.5m tall, hollow, angled, ribbed, with vertical striations, glabrous, reddish-purple at the base.
Leaves - Alternate, petiolate. Petioles longest at the base of the plant, reduced upward, to +/-18cm long, glabrous, with a shallow adaxial groove. Groove reddish on the margins. Blades typically reniform in the lower 2/3 of the plant, becoming truncate at the base in the apical 1/3 of the plant, to +/-20cm broad, +/-15cm long, coarse and irregular dentate, green above, silvery-green below, with impressed veins above, expressed veins below, pubescent with multicellular trichomes (more so below), with a rubbery texture.
Inflorescence - Terminal corymbiform arrangement of flower heads. Peduncles whitened, glabrous. Each division of the inflorescence subtended by a minute bract. Bracts subulate, white, 1-5mm long.
Involucre -Cylindric, whitened, to 1cm tall, glabrous. Phyllaries 5, united, with a rounded keel that gives the involucre a carinate look, glabrous.
Ray flowers - Absent.
Disk flowers - Flowers typically 5 per flower head. Apices of flowers exceeding the involucre, otherwise enclosed in it. Corolla tube glabrous, greenish, 7mm long, 5-lobed, expanded at the apex into a short campanulate tube. The tube to 1mm long. Lobes white, glabrous, curled, to 3mm long (uncurled), -1mm broad, acute. Stamens 5, adnate at the base of the campanulate portion of the corolla tube. Filaments filiform, yellowish-tan, glabrous. Anthers tan-brown, +2mm long, connate around the style, exserted. Style exserted beyond the anthers, glabrous, white, bifurcate. The free ends of the style recurved all the way back to the main body of the style. Pappus of white capillary bristles to 7mm long. Achene green and glabrous in flower, cylindric, to 3mm long.
Flowering - May - September.
Habitat - Rich woods, north or east-facing slopes, ravines, bluffs along streams.
Origin - Native to U.S.
Other info. - This striking species can be found in the mainly in the eastern half of the state with the exception of a few extreme southwestern counties. The plant is very easy to ID in the field because of its distinct basal leaves. The plant is most often seen as just basals because it takes about 2-3 years to bloom for the first time. It grows well from seed and would make a fine plant in cultivation.
Stems - Single or multiple from base, erect, herbaceous but stout, mostly simple, to 1.5m tall, hollow, angled, ribbed, with vertical striations, glabrous, reddish-purple at the base.
Leaves - Alternate, petiolate. Petioles longest at the base of the plant, reduced upward, to +/-18cm long, glabrous, with a shallow adaxial groove. Groove reddish on the margins. Blades typically reniform in the lower 2/3 of the plant, becoming truncate at the base in the apical 1/3 of the plant, to +/-20cm broad, +/-15cm long, coarse and irregular dentate, green above, silvery-green below, with impressed veins above, expressed veins below, pubescent with multicellular trichomes (more so below), with a rubbery texture.
Inflorescence - Terminal corymbiform arrangement of flower heads. Peduncles whitened, glabrous. Each division of the inflorescence subtended by a minute bract. Bracts subulate, white, 1-5mm long.
Involucre -Cylindric, whitened, to 1cm tall, glabrous. Phyllaries 5, united, with a rounded keel that gives the involucre a carinate look, glabrous.
Ray flowers - Absent.
Disk flowers - Flowers typically 5 per flower head. Apices of flowers exceeding the involucre, otherwise enclosed in it. Corolla tube glabrous, greenish, 7mm long, 5-lobed, expanded at the apex into a short campanulate tube. The tube to 1mm long. Lobes white, glabrous, curled, to 3mm long (uncurled), -1mm broad, acute. Stamens 5, adnate at the base of the campanulate portion of the corolla tube. Filaments filiform, yellowish-tan, glabrous. Anthers tan-brown, +2mm long, connate around the style, exserted. Style exserted beyond the anthers, glabrous, white, bifurcate. The free ends of the style recurved all the way back to the main body of the style. Pappus of white capillary bristles to 7mm long. Achene green and glabrous in flower, cylindric, to 3mm long.
Flowering - May - September.
Habitat - Rich woods, north or east-facing slopes, ravines, bluffs along streams.
Origin - Native to U.S.
Other info. - This striking species can be found in the mainly in the eastern half of the state with the exception of a few extreme southwestern counties. The plant is very easy to ID in the field because of its distinct basal leaves. The plant is most often seen as just basals because it takes about 2-3 years to bloom for the first time. It grows well from seed and would make a fine plant in cultivation.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Brassicaceae
Stems - Multiple from the base, erect to ascending, herbaceous, mostly unbranched (except at apex), to 1m tall, scabrous from dense forked and stellate pubescence.
Leaves - Alternate, sessile. Blades linear-elliptic, entire, 5-8cm long, +/-1cm broad, rounded to subacute at apex, stellate pubescent above and below, reduced upward on stem.
Inflorescence - Terminal and lateral racemes to +/-25cm long. Racemes dense in flower, quickly elongating in fruit. Pedicels ascending, to 7-8mm long, stellate and forked pubescent.
Flowers - Petals 4, 5-7mm long, deeply notched at apex, tapering at base, glabrous. Lobes rounded to acute at apex. Stamens 6, erect, glabrous, white, 3-4mm long. Anthers yellow, to 1mm long. Ovary superior, green, densely stellate pubescent, 1mm long in flower. Style green, to 2mm long, sparse stellate pubescent, persistent in fruit. Sepals 4, erect, densely stellate pubescent externally, glabrous internally, 3-4mm long, to 1mm broad, with scarious margins, elliptic, acute. Silicle 6-7mm long, elliptic-ovate to orbicular, stellate pubescent, beaked, with 6-10 seeds. Beak to 2mm long.
Flowering - May - September.
Habitat - Roadsides, railroads, waste ground.
Origin - Native to Europe.
Other info. - This striking species is rare in Missouri but is becoming more common. The plant is very common in more northern states and is spreading throughout much of eastern North America. The plant is easy to ID in the field because of its deeply divided white petals and gray stellate pubescence.
Stems - Multiple from the base, erect to ascending, herbaceous, mostly unbranched (except at apex), to 1m tall, scabrous from dense forked and stellate pubescence.
Leaves - Alternate, sessile. Blades linear-elliptic, entire, 5-8cm long, +/-1cm broad, rounded to subacute at apex, stellate pubescent above and below, reduced upward on stem.
Inflorescence - Terminal and lateral racemes to +/-25cm long. Racemes dense in flower, quickly elongating in fruit. Pedicels ascending, to 7-8mm long, stellate and forked pubescent.
Flowers - Petals 4, 5-7mm long, deeply notched at apex, tapering at base, glabrous. Lobes rounded to acute at apex. Stamens 6, erect, glabrous, white, 3-4mm long. Anthers yellow, to 1mm long. Ovary superior, green, densely stellate pubescent, 1mm long in flower. Style green, to 2mm long, sparse stellate pubescent, persistent in fruit. Sepals 4, erect, densely stellate pubescent externally, glabrous internally, 3-4mm long, to 1mm broad, with scarious margins, elliptic, acute. Silicle 6-7mm long, elliptic-ovate to orbicular, stellate pubescent, beaked, with 6-10 seeds. Beak to 2mm long.
Flowering - May - September.
Habitat - Roadsides, railroads, waste ground.
Origin - Native to Europe.
Other info. - This striking species is rare in Missouri but is becoming more common. The plant is very common in more northern states and is spreading throughout much of eastern North America. The plant is easy to ID in the field because of its deeply divided white petals and gray stellate pubescence.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Fabaceae
Stems - To 1.5m tall, branching, glabrous, glaucous, herbaceous.
Leaves - Alternate, trifoliolate, at least some with petiole .2-1.5cm long. Leaflets oblong, oblanceolate, or narrowly obovate, +/-6cm long, 2cm broad, glabrous, glaucous below, entire, minutely mucronate(-1mm long). Center leaflet sessile or on stalk shorter than lateral leaflets. Stipules to +1cm long, glabrous, erect, +2mm wide.
Inflorescence - An axillary raceme to +30(50)cm long (high).
Flowers - White, pedicillate, 2-3cm long, papilionaceous. Calyx tube not more than 1/2 the length of the corolla, cylindrical, typically -1cm long. Stamens 10. Fruits inflated, cylindrical, 2.5-4cm long, 1-1.5cm wide, many seeded, with beak at apex +/-5mm long.
Flowering - May - July.
Habitat - Roadsides, railroads, wet low ground, prairies, pastures.
Origin - Native to U.S.
Other info. - This plant is typically taller than other species of Baptisia in Missouri. It is an attractive plant when flowering and is sometimes cultivated.
The genus name comes from the Greek word "bapto" which means "to dye" because some of the darker flowered species were used as dyes.
A synonym is B. lactea (Raf.) Thieret.
Stems - To 1.5m tall, branching, glabrous, glaucous, herbaceous.
Leaves - Alternate, trifoliolate, at least some with petiole .2-1.5cm long. Leaflets oblong, oblanceolate, or narrowly obovate, +/-6cm long, 2cm broad, glabrous, glaucous below, entire, minutely mucronate(-1mm long). Center leaflet sessile or on stalk shorter than lateral leaflets. Stipules to +1cm long, glabrous, erect, +2mm wide.
Inflorescence - An axillary raceme to +30(50)cm long (high).
Flowers - White, pedicillate, 2-3cm long, papilionaceous. Calyx tube not more than 1/2 the length of the corolla, cylindrical, typically -1cm long. Stamens 10. Fruits inflated, cylindrical, 2.5-4cm long, 1-1.5cm wide, many seeded, with beak at apex +/-5mm long.
Flowering - May - July.
Habitat - Roadsides, railroads, wet low ground, prairies, pastures.
Origin - Native to U.S.
Other info. - This plant is typically taller than other species of Baptisia in Missouri. It is an attractive plant when flowering and is sometimes cultivated.
The genus name comes from the Greek word "bapto" which means "to dye" because some of the darker flowered species were used as dyes.
A synonym is B. lactea (Raf.) Thieret.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Fabaceae
Stems - Multiple from base, from a taproot and branched caudex, ascending to erect, branching, herbaceous, glabrescent below, with antrorse appressed hairs above,(more dense in young plants), often reddish, to 50cm tall.
Leaves - Alternate, odd-pinnate, stipulate. Stipules to 1cm long, 5mm broad at base, with scarious margins, acute to acuminate, glabrous but with papillate margins. Leaflets opposite to subopposite, +/-10 pairs per leaf, to 1.5cm long, 7-8mm broad, rounded at apex, oblong to oblong-ovate, entire but with cilia on margins, glabrous above, sericeous below, with short petiolules. Petiolules to 1mm long, pilose.
Inflorescence - Axillary long-pedunculate racemes. Peduncles to +/-7cm long, sericeous. Pedicels to 2mm long, densely sericeous to appressed pubescent. Raceme to +/-5cm long(tall). Each flower subtended by a minute lanceolate bract. Bracts to 3mm long, 1mm broad at base, with green midvein.
Flowers - Corolla papilionaceous, creamy white. Standard to 1.9cm long, 8mm broad at apex, glabrous. Keels apically connate and purplish at apex, folded around style and stamens. Stamens diadelphous. Filaments glabrous, white, to 1.3cm long. Anthers orange-red, .7mm long. Ovary green, 3-4mm long, terete, glabrous. Style greenish white, 1.1cm long, apically curved upward, glabrous. Calyx creamy white to yellowish-green, 1cm long, 3-4mm in diameter, tomentose externally, glabrous internally, 5-toothed. Teeth to -2mm long, acute, unequal. Top 2 teeth more triangular then the lower 3. Fruits plump, +/-2cm in diameter, subglobose, reddish-purple when ripe, glabrous.
Flowering - March - May.
Habitat - Rocky open woods, glades, bluffs, rocky prairies.
Origin - Native to U.S.
Other info. - This is an attractive species which can be found in the lower 2/3 of the state. The plant prefers dry open areas. It should be cultivated more frequently. This species is easy to ID while in flower because of its tomentose calices, whitish flowers, and plumlike fruits. The fruits of this species can be eaten raw or cooked while green and unripe.
Our plants belong to variety trichocalyx (Nutt.) Fern.
A synonym for this species is A. crassicarpus var. trichocalyx (Nutt.) Barneby.
Stems - Multiple from base, from a taproot and branched caudex, ascending to erect, branching, herbaceous, glabrescent below, with antrorse appressed hairs above,(more dense in young plants), often reddish, to 50cm tall.
Leaves - Alternate, odd-pinnate, stipulate. Stipules to 1cm long, 5mm broad at base, with scarious margins, acute to acuminate, glabrous but with papillate margins. Leaflets opposite to subopposite, +/-10 pairs per leaf, to 1.5cm long, 7-8mm broad, rounded at apex, oblong to oblong-ovate, entire but with cilia on margins, glabrous above, sericeous below, with short petiolules. Petiolules to 1mm long, pilose.
Inflorescence - Axillary long-pedunculate racemes. Peduncles to +/-7cm long, sericeous. Pedicels to 2mm long, densely sericeous to appressed pubescent. Raceme to +/-5cm long(tall). Each flower subtended by a minute lanceolate bract. Bracts to 3mm long, 1mm broad at base, with green midvein.
Flowers - Corolla papilionaceous, creamy white. Standard to 1.9cm long, 8mm broad at apex, glabrous. Keels apically connate and purplish at apex, folded around style and stamens. Stamens diadelphous. Filaments glabrous, white, to 1.3cm long. Anthers orange-red, .7mm long. Ovary green, 3-4mm long, terete, glabrous. Style greenish white, 1.1cm long, apically curved upward, glabrous. Calyx creamy white to yellowish-green, 1cm long, 3-4mm in diameter, tomentose externally, glabrous internally, 5-toothed. Teeth to -2mm long, acute, unequal. Top 2 teeth more triangular then the lower 3. Fruits plump, +/-2cm in diameter, subglobose, reddish-purple when ripe, glabrous.
Flowering - March - May.
Habitat - Rocky open woods, glades, bluffs, rocky prairies.
Origin - Native to U.S.
Other info. - This is an attractive species which can be found in the lower 2/3 of the state. The plant prefers dry open areas. It should be cultivated more frequently. This species is easy to ID while in flower because of its tomentose calices, whitish flowers, and plumlike fruits. The fruits of this species can be eaten raw or cooked while green and unripe.
Our plants belong to variety trichocalyx (Nutt.) Fern.
A synonym for this species is A. crassicarpus var. trichocalyx (Nutt.) Barneby.
0
0
文章
Dummer. ゛☀
2017年07月14日
Family - Fabaceae
Stems - Multiple from base, erect, divaricately branching, reddish in strong sun, herbaceous, fistulose, from rhizomes, appressed pubescent. Hairs of stem running parallel to axis of stem, attached in the middle (=malpighaceous).
Leaves - Alternate, odd pinnate, stipulate. Stipules attenuate, to 5mm long, pubescent. Leaflets opposite, 13-20 pairs per leaf, mucronate, entire, elliptic to lance-oblong, appressed bifurcate pubescent above and below (less so above), gradually decreasing in size towards tip of leaf. The larger leaflets 1.3cm wide, 3cm long. Petiolules to 1.5mm long.
Inflorescence - Axillary racemes to +/-15cm long(high), 30-70 flowered. Peduncle carinate, pubescent. Pedicels 1.1mm long, each subtended by a linear-attenuate bract to 6mm long.
Flowers - Corolla papilionaceous, creamy white to greenish white or with a tinge of lilac, to 2cm long. Standard 6mm broad, notched at apex, 1.4cm long. Keel petals with purplish spots at apex. Stamens diadelphous. Anthers yellow, .5mm long. Filaments glabrous. Ovary green, 5mm long, terete, very sparse pubescent. Style white, to +7mm long, glabrous, upcurved. Calyx tube less than half the length of the corolla, pubescent, whitish-green, 5-lobed. Lobes to 2mm long, acute. Fruits inflated, to 1.1cm long, beaked with persistent style, typically glabrous, 2-valved, with +/-10 seeds.
Flowering - May - August.
Habitat - Thickets, wet lowlands, pastures, prairies, upland woods, waste ground.
Origin - Native to U.S.
Other info. - This species can be found throughout Missouri and is absent only from the extreme southeastern portion of the state. The plant is easy to identify while in flower but vegetatively it can be mistaken for many other plants. It is the most common Astragalus in Missouri.
This species grows about as wide as tall and would make an excellent specimen garden plant.
Stems - Multiple from base, erect, divaricately branching, reddish in strong sun, herbaceous, fistulose, from rhizomes, appressed pubescent. Hairs of stem running parallel to axis of stem, attached in the middle (=malpighaceous).
Leaves - Alternate, odd pinnate, stipulate. Stipules attenuate, to 5mm long, pubescent. Leaflets opposite, 13-20 pairs per leaf, mucronate, entire, elliptic to lance-oblong, appressed bifurcate pubescent above and below (less so above), gradually decreasing in size towards tip of leaf. The larger leaflets 1.3cm wide, 3cm long. Petiolules to 1.5mm long.
Inflorescence - Axillary racemes to +/-15cm long(high), 30-70 flowered. Peduncle carinate, pubescent. Pedicels 1.1mm long, each subtended by a linear-attenuate bract to 6mm long.
Flowers - Corolla papilionaceous, creamy white to greenish white or with a tinge of lilac, to 2cm long. Standard 6mm broad, notched at apex, 1.4cm long. Keel petals with purplish spots at apex. Stamens diadelphous. Anthers yellow, .5mm long. Filaments glabrous. Ovary green, 5mm long, terete, very sparse pubescent. Style white, to +7mm long, glabrous, upcurved. Calyx tube less than half the length of the corolla, pubescent, whitish-green, 5-lobed. Lobes to 2mm long, acute. Fruits inflated, to 1.1cm long, beaked with persistent style, typically glabrous, 2-valved, with +/-10 seeds.
Flowering - May - August.
Habitat - Thickets, wet lowlands, pastures, prairies, upland woods, waste ground.
Origin - Native to U.S.
Other info. - This species can be found throughout Missouri and is absent only from the extreme southeastern portion of the state. The plant is easy to identify while in flower but vegetatively it can be mistaken for many other plants. It is the most common Astragalus in Missouri.
This species grows about as wide as tall and would make an excellent specimen garden plant.
0
0
文章
Dummer. ゛☀
2017年07月13日
Family - Asteraceae
Stems - Single or multiple from the base, from many long slightly thickened roots, with sterile leafy offshoots and erect fertile stems, branching, striate, hirsute to pilose, herbaceous, terete, to 1m tall. Hairs of the stem multicellular (use a lens to see), dense, to +2-3mm long, spreading.
Leaves - Alternate. Basal leaves petiolate, spatulate, to 20cm long (with petiole). Petiole winged (the wings erect and creating an adaxial groove), pilose. Blades of the basal leaves coarse serrate, to +3.5cm broad, appressed pubescent above and below, acute, elliptic (narrowly). Margins antrorse ciliolate. Major veins of leaf parallel to the midrib. Cauline leaves reduced upward, becoming sessile, entire, narrowly elliptic to linear, ciliate at the base, with spreading pubescence abaxially, antrorse appressed pubescent adaxially.
Inflorescence - Paniculate arrangement of flower heads. Heads pedunculate. Peduncles to +1cm long, each subtended by a foliaceous bract, densely pilose. Stems in the inflorescence densely pilose.
Involucre - Cylindric, 5-6mm tall, 3-4mm in diameter. Phyllaries apically acuminate to attenuate, with green spreading apices (the very tip hardened, sharp, and translucent), subulate, translucent but with a green midrib and apex, 4-5mm long, 1mm broad, mostly glabrous internally and externally but with some glands externally near the apex. Apical margins minutely glandular serrate (use a lens to see).
Ray flowers - +/-30 per flower head, fertile, pistillate. Ligules white, to 1cm long, 1-2mm broad, minutely notched at the apex (use a lens to see), glabrous. Corolla tube sparsely pubescent externally, glabrous internally. Style exserted, yellowish at the apex, bifurcate. Stigmas 1mm long.
Disk flowers - Disk 5-8mm broad. Corollas 4-5mm long, 5-lobed, glabrous internally and externally, yellowish in apical half, greenish basally. Lobes erect, acute, 1.1mm long, yellowish to reddish with age, glabrous. Stamens 5, exserted, adnate in middle of the corolla tube. Filaments thin, glabrous, white to yellowish. Anthers yellow, connate around the style, -2mm long. Style green basally, glabrous, exserted, purple and bifurcate apically. Receptacle flat and naked.
Flowering - August - November.
Habitat - Dry soils of fallow fields, meadows, prairies, glades, rocky open ground, gravel bars, roadsides, railroads, waste ground, disturbed sites.
Origin - Native to U.S.
Other info. - This highly variable species is common and found throughout Missouri. It is one of the most common Asters in the eastern U.S.
The plant can have glabrous to hirsute stems and leaves and variably shaped leaves. Steyermark separates the species into 3 varieties and several forms based on pubescence and leaf shape. The plant described above is A. pilosus var. pilosus f. pilosus. A glabrous variety, var. demotus Blake is perhaps the most common variety in the state which can lead to confusion when trying to differentiate this species from other in the genus. The hardened, sharp apices of the involucre are a good characteristic for field identification.
Stems - Single or multiple from the base, from many long slightly thickened roots, with sterile leafy offshoots and erect fertile stems, branching, striate, hirsute to pilose, herbaceous, terete, to 1m tall. Hairs of the stem multicellular (use a lens to see), dense, to +2-3mm long, spreading.
Leaves - Alternate. Basal leaves petiolate, spatulate, to 20cm long (with petiole). Petiole winged (the wings erect and creating an adaxial groove), pilose. Blades of the basal leaves coarse serrate, to +3.5cm broad, appressed pubescent above and below, acute, elliptic (narrowly). Margins antrorse ciliolate. Major veins of leaf parallel to the midrib. Cauline leaves reduced upward, becoming sessile, entire, narrowly elliptic to linear, ciliate at the base, with spreading pubescence abaxially, antrorse appressed pubescent adaxially.
Inflorescence - Paniculate arrangement of flower heads. Heads pedunculate. Peduncles to +1cm long, each subtended by a foliaceous bract, densely pilose. Stems in the inflorescence densely pilose.
Involucre - Cylindric, 5-6mm tall, 3-4mm in diameter. Phyllaries apically acuminate to attenuate, with green spreading apices (the very tip hardened, sharp, and translucent), subulate, translucent but with a green midrib and apex, 4-5mm long, 1mm broad, mostly glabrous internally and externally but with some glands externally near the apex. Apical margins minutely glandular serrate (use a lens to see).
Ray flowers - +/-30 per flower head, fertile, pistillate. Ligules white, to 1cm long, 1-2mm broad, minutely notched at the apex (use a lens to see), glabrous. Corolla tube sparsely pubescent externally, glabrous internally. Style exserted, yellowish at the apex, bifurcate. Stigmas 1mm long.
Disk flowers - Disk 5-8mm broad. Corollas 4-5mm long, 5-lobed, glabrous internally and externally, yellowish in apical half, greenish basally. Lobes erect, acute, 1.1mm long, yellowish to reddish with age, glabrous. Stamens 5, exserted, adnate in middle of the corolla tube. Filaments thin, glabrous, white to yellowish. Anthers yellow, connate around the style, -2mm long. Style green basally, glabrous, exserted, purple and bifurcate apically. Receptacle flat and naked.
Flowering - August - November.
Habitat - Dry soils of fallow fields, meadows, prairies, glades, rocky open ground, gravel bars, roadsides, railroads, waste ground, disturbed sites.
Origin - Native to U.S.
Other info. - This highly variable species is common and found throughout Missouri. It is one of the most common Asters in the eastern U.S.
The plant can have glabrous to hirsute stems and leaves and variably shaped leaves. Steyermark separates the species into 3 varieties and several forms based on pubescence and leaf shape. The plant described above is A. pilosus var. pilosus f. pilosus. A glabrous variety, var. demotus Blake is perhaps the most common variety in the state which can lead to confusion when trying to differentiate this species from other in the genus. The hardened, sharp apices of the involucre are a good characteristic for field identification.
1
0
