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花园 (6)
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Dummer. ゛☀
2017年07月11日
Dummer. ゛☀
Family - Dipsacaceae Stems - To 3m tall, with hooked and straight prickles, striate ridged, herbaceous but stout, erect, typically single from the base, branching in the apical half. Leaves - Opposite, joined at base and surrounding the stem (confluent), pinnatifid to bipinnatifid.
Inflorescence - Dense terminal, cylindrical clusters (heads) to 10cm tall, 5cm in diameter, with an involucre of spreading bracts. Bracts, linear to linear-lanceolate, to 10cm long, 1cm wide, shorter than flower head is long Flowers - Small, hundreds in head. Corolla white, to 13mm long. Each flower with a long stiff green bract.
Flowering - June - September. Habitat - Roadsides, railroads. Origin - Native to Europe. Other info. - This and the other members of the genus are highly aggressive weeds which are spreading rapidly in this state. They may be attractive but are replacing native vegetation. The flower heads can be used in dried arrangements but be careful not to spread the small seeds everywhere! The flowers of this genus typically open in the middle of the head first and then open towards each end.
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Dummer. ゛☀
2017年07月11日
Dummer. ゛☀
Family - Ranunculaceae Stems - Sprawling and climbing, sparse to moderately pubescent, herbaceous to woody, purplish, carinate, very long. Leaves - Opposite, 3-5 foliate, petiolate. Leaflets lobed and/or coarse serrate, typically ovate to lanceolate, sparse pubescent to glabrous, sericeous below, +/-6cm long, +/-3cm broad. Petiolules to 1cm long or sometimes absent on upper pair of lateral leaflets. Petioles pubescent and purplish.
Inflorescence - Fairly dense axillary panicles. Each division of panicle subtended by pair of small foliaceous bracts. Peduncles and pedicels pubescent. Flowers - Fragrant. Plants dioecious. Petals absent. Petaloid sepals 4, white, to 1.2cm long, +/-4mm broad, pubescent. Stamens erect to spreading, +/-25. Filaments to 8mm long, white, glabrous. Anthers pale yellow, 1.2mm long. Pistillate flowers with sterile stamens. Pistils many (6-10). Achenes sericeous, to -5mm long. Styles plumose, to +3cm long.
Flowering - July - September. Habitat - Moist and low ground of woodlands, moist slopes, streambanks, fence rows. Origin - Native to U.S. Other info. - This species is the only native pure white flowered Clematis in Missouri. The similar C. dioscoreifolia Levl. & Vanoit is native to Japan, has larger flowers, and has leaflets which are entire and typically unlobed. The flower close-ups shown are of staminate flowers.
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Dummer. ゛☀
2017年07月11日
Dummer. ゛☀
Family - Oleaceae Stems - Erect, multiple or single from base, to 10m, branching, woody. Twigs glabrous. Leaves - Opposite, petiolate. Petiole pubescent, to 2cm long. Blades to +12cm long, +6cm broad, elliptic, mostly glabrous above, pubescent below. Inflorescence - Terminal cymes to +10cm long, often drooping. Peduncles thin(-1mm in diameter), glabrous. Pedicels to 7mm long. Branches of panicle opposite, decussate. Flowers - Corolla white, deeply 4-lobed, glabrous. Corolla tube to 3mm long, with purple internally. Lobes +1.5cm long, 3mm broad, linear to oblanceolate, rounded at apex. Stamens 2, included, adnate to corolla tube. Filaments short. Anthers 1.2mm long, purplish. Ovary superior, 2-locular. Placentation axile. Calyx tube to 1.2mm long, green, glabrous, 4-lobed. Lobes 2mm long, acute, glabrous. Fruit a dark subglobose to ovoid drupe to 1.5cm long.
Flowering - April - May. Habitat - Rocky ground along bluffs, glades, and ledges. Also found in wet woods and in cultivation. Origin - Native to U.S. Other info. - This species is becoming popular in cultivation because of its showy flower clusters and the fact it is native. Typically the plant is shrubby but it can be grown as a small tree. The plant was used medicinally by Indians and more modern physicians to treat many ailments from congestion to infections. It is not used much anymore.
In Missouri the plant is found growing wild only in a few southern counties. It is cold tolerant and can grows as far north as New Jersey.
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Dummer. ゛☀
2017年07月11日
Dummer. ゛☀
Family - Portulacaceae Stems - To 30cm tall, typically erect, herbaceous, subsucculent, glabrous, herbaceous, from a corm. Leaves - Cauline leaves opposite, linear, glabrous, to +10cm long, typically 2-5mm broad, with single midrib, sessile, entire. Inflorescence - Terminal raceme. Buds nodding, erect in flower. Pedicels to 3cm long, glabrous. Inflorescence subtended by single sessile ovate bract. Bract entire, to 5mm long, 4mm broad, glabrous, green.
Flowers - Petals 5, obovate, to +1cm long, +5mm broad, entire, glabrous, rounded at apex, white with pink veins or pinkish with darker veins. Stamens 3-5, erect. Filaments pinkish, glabrous, expanded at base and surrounding ovary, 4mm long. Anthers pink, +1mm long. Ovary obovoid, green, glabrous, 1.6mm long, 1.2mm broad, sub 3-sided, unilocular. Styles 3, united below, to 4mm long, free in the apical 1mm or so, pinkish at apex. Sepals 2, green, to 7mm long 4mm broad, lance-ovate, glabrous, acute. Capsules to 4mm long, glabrous, 3-valved. Flowering - February - May. Habitat - Dry open woods, glades, slopes, prairies, low woods. Origin - Native to U.S. Other info. - This little plant is one of the earliest bloomers in spring. The flowering period is actually quite long for such an early plant. The plant is easy to ID in the field because of its distinctive flowers and its thin opposite cauline leaves. Apparently the species is edible and fairly tasty but I have never eaten it.
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Dummer. ゛☀
2017年07月11日
Dummer. ゛☀
Family - Asteraceae Stems - To +/-50cm tall, single from base but with many spreading branches, from fibrous roots, strigose, herbaceous, subsucculent, erect or ascending, often rooting at lowest nodes, terete, purplish in strong sun.
Leaves - Opposite, sessile, lanceolate , shallow serrate, to 13cm long, 3cm broad, strigose, acuminate.
Inflorescence - Axillary and terminal clusters of 1-3 flower heads. Peduncles to -2cm long, densely antrorse strigose. Involucre - Typically a single series of 8-10 unequal phyllaries. Phyllaries to 7mm ong, 2.3mm broad, antrorse strigose externally, glabrous internally, green, acute. Ray flowers - Fertile, pistillate. Ligules to -2mm long, .5mm broad, notched or rounded at apex. Achenes 3-angled, white, 1mm long, glabrous. Pappus absent. Disk flowers - Disk 4-10mm broad. Corolla tube to .9mm long, 4-lobed, glabrous, white. Lobes acute, .3mm long. Stamens 4. Anthers purple, .5-.6mm long, included, connate around style. Style whitish at apex (stigmas). Achenes (in fruit) to 2.5mm long, warty, 4-angled. Pappus absent to a minute crown. Receptacle flat. Chaff to -3mm long, translucent yellow, antrorsely barbellate. Flowering - July - October. Habitat - Wet areas. Origin - Native to U.S. and tropical areas worldwide. Other info. - This plant is quite prolific. It can grow on land or directly in the water. The stems often form roots from the nodes when floating in the water. The tiny white flowers and opposite leaves are good characteristics for identifying this species in the field. It is common throughout Missouri. The plant does contain alkaloids but is often cooked and eaten. A modern synonym is Eclipta prostrata (L.) L.
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Dummer. ゛☀
2017年07月11日
Dummer. ゛☀
Family - Caryophyllaceae Stems - Multiple from base, from taproot, ascending to erect, branching, herbaceous, densely retrorse strigillose, to +/-15cm tall.
Leaves - Opposite, sessile, ovate, acute, entire, glabrous, with antrorse strigillose margins, 3-4mm broad, 6-7mm long. Inflorescence - Axillary single flowers or terminal loose cymes. Pedicels elongating in fruit to 1cm, retrorse strigose. Flowers - Petals 5, white, entire, glabrous, to 3mm long, distinct. Stamens 10, erect. Filaments white, glabrous, 1mm long. Anthers whitish to pale yellow. Styles 3, white, glabrous, -1mm long. Ovary superior, green, glabrous, 1.5mm long, 1mm in diameter, unilocular. Placentation free-central. Ovules many. Sepals 5, glandular pubescent, lanceolate, 1.2mm broad, 4mm long, acute.
Flowering - April - August. Habitat - Glades, fields, bluffs, roadsides, railroads. Origin - Native to Europe. Other info. - This tiny plant is common in Missouri but mostly south of the Missouri River. This species can be identified in the field by its small ovate leaves and its small white petals, which are smaller than the sepals.
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Dummer. ゛☀
2017年07月11日
Dummer. ゛☀
Family - Asteraceae Stems - To 2m tall, pubescent above, glabrescent below.
Leaves - Opposite, toothed, petiolate, acuminate, ovate to lanceolate, to +15cm long, 10cm broad, typically glabrous. Inflorescence - Terminal corymbiform clusters with many flower heads. Flower heads with +/-15 flowers.
Involucre - +/-5mm long(tall). Phyllaries imbricate, obtuse or rounded, pubescent. Ray flowers - Absent. Disk flowers - Corolla white to grayish-lavender, 5-lobed. Pappus of capillary bristles. Achenes black when mature. Flowering - August - October. Habitat - Pastures, prairies, waste ground, disturbed sites, roadsides, railroads. Origin - Native to U.S. Other info. - One of the most common "weeds" in the state, this plant is a dominant presence of the landscape when in full bloom. It is a pioneering plant and thrives in areas which get cut or mowed on occasion. It is definitely the most common Eupatorium in Missouri.
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