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花园 (4)
动态 (4985)
Miss Chen
2018年05月02日
Miss Chen
Close-up of FlowerDescription: This herbaceous perennial plant is 4-12" tall, consisting of a short stem that branches at ground level into 2 basal leaves with long petioles. The basal leaves are up to 3" long and 4" across. They are cordate-orbicular, deeply indented at the base, and have smooth margins. Their upper surface is slightly hairy and shiny. From the axil of a pair of leaves, develops a single reddish brown flower on a short stalk. Both the flowering stalk and the petioles of the leaves are covered with white hairs that are long and twisted. The flower is about 1" across; it has 3 calyx lobes that are triangular in shape and curl backward. The thick tubular base of calyx is divided into 6 rounded chambers (3 primary chambers, which are each divided into 2 secondary chambers). These chambers contain the ovaries, which develop into rows of seeds. The tubular base of the calyx is light reddish brown and covered with long white hairs. There is a stout column of reproductive organs at the throat of the flower, which is reddish brown like the lobes. It is surrounded by the inner surface of the calyx, which is white. The blooming period occurs from mid- to late spring, and lasts about 3 weeks. After the flowers wither away, the seed capsule splits open to release the seeds. These seeds have a fleshy appendage. The root system consists of shallow rhizomes that are fleshy and branching. This plant often forms vegetative colonies. Cultivation: The preference is light shade and moist to slightly dry conditions. The soil should be rich and loamy, although some rocky material underneath the soil surface is acceptable. Range & Habitat: The native Wild Ginger is a common plant that can be found in most counties of Illinois (see Distribution Map). Habitats include moist to slightly dry deciduous woodlands (both floodplain and upland), and bluffs. It often found along ravines and slopes. Faunal Associations: The reddish brown flowers probably attract flies or beetles as pollinating agents. The seeds attract ants because of their fleshy appendages; these insects help to disperse the seeds. The toxic foliage is not eaten by mammalian herbivores.
Photographic Location: The edge of a wooded bluff at Kickapoo State Park in Vermilion County, Illinois, where this plant is quite common. The foliage in the upper left corner of the photograph of the basal leaves is Dentaria laciniata (Cutleaf Toothwort). Comments: This plant is called 'Wild Ginger' because the aromatic rhizomes have a ginger-like fragrance and flavor. Fresh or dried, they can be used as a substitute for the spice. Different varieties of Wild Ginger have been described by different authorities, which vary according to the length of the calyx lobes, and whether they are spreading or reflexed. The variety that is described here, Asarum canadense reflexum, is the most common variety of Wild Ginger in Illinois.
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Miss Chen
2018年05月02日
Miss Chen
Description: This herbaceous perennial plant is ½–2' tall and unbranched. The central stem is light green, glabrous to pubescent, and slender. Several alternate leaves occur along this stem; the stem has a tendency to zigzag between pairs of succeeding leaves. The leaf blades are 2–5" long and ½–2" across; they are narrowly cordate, ovate-sagittate, or narrowly hastate with a pair of rounded basal lobes. The leaves are indented where the petioles join the blades, and their tips are narrowly acute to acute. Two varieties of this plant have been described: the typical variety (var. serpentaria) has leaves usually exceeding ¾" in wide that are cordate or ovate-sagittate in shape, while a narrow-leaved variety (var. hastata) has leaves less than ¾" across that are narrowly hastate in shape. Both the upper and lower surfaces of the leaf blades are medium green and glabrous. The slender petioles are light green and ¼–1¼" long. One or more solitary flowers are produced from the tips of lateral stems that are found at the base of the plant; these flowers are held slightly above the ground surface, lie directly on the ground surface, or they are buried by fallen leaves. The alternate leaves of these lateral stems have been reduced to bracts that are less than ¼" in length. The flowers are ½–¾" in length; they are shaped somewhat like an old-fashioned tobacco pipe. Each flower has a petaloid calyx that is tubular and curved, 6 stamens, and an inferior ovary with a single style and 3-lobed stigma. The petaloid calyx is somewhat constricted at the throat, while its narrow outer opening is surrounded by 3 blunt lobes that are joined together and spreading. The outer surface of the petaloid calyx varies in color from pale greenish purple to deep reddish brown (maroon) and it is more or less pubescent. In addition to the chasmogamous (insect-pollinated) flowers that have been described, sometimes smaller cleistogamous (self-fertile) flowers are produced. The blooming period occurs during the late spring or summer. Afterwards, fertile flowers are replaced by 6-valved seed capsules that are about ½" across at maturity and more or less globoid in shape. The outer surface of each seed capsule has 6 fine ridges along its outer surface that are equidistant and longitudinal. Eventually, these seed capsules split open to release their seeds (there are about 48 seeds per capsule). These seeds are 4-5 mm. long, compressed-obovoid in shape, and brown. The root system consists of a short knotty rhizome that has abundant fibrous roots below. Cultivation: The preference is light to medium shade, mesic conditions, and a loamy soil with decaying organic matter (e.g., fallen leaves). As the flowers are not conspicuous, this is primarily a foliage plant for shade gardens or restoration of woodland habitat. Range & Habitat: The native Virginia Snakeroot is uncommon to occasional in most areas of Illinois, except in the NW section of the state, where it is absent (see Distribution Map). The typical variety of this plant (Aristolochia serpentaria serpentaria) occurs in all of the areas that are indicated, while the narrow-leaved variety (Aristolochia serpentaria hastata) is restricted to the southern tip of Illinois, where it is rare. Illinois lies near the northern range-limit of this plant. Habitats include rich mesic woodlands, upland rocky woodlands, wooded slopes, and wooded ravines. This is a conservative species that is normally found in higher quality woodlands where the original ground flora is intact. It usually occurs in the forest understory as scattered solitary plants, rather than in colonies. Faunal Associations: The odd-looking flowers are cross-pollinated primarily by flesh flies, fungus gnats, and possibly carrion beetles. After entering the flowers, these insects remain trapped in the calyx tube until the stamens mature, after which they escape carrying some of the pollen on their bodies. The floral reward of these insects is primarily nectar. The caterpillars of a butterfly, the Pipevine Swallowtail (Battus philenor), feed on the foliage of Virginia Snakeroot (Aristolochia serpentaria), although more than one plant is required to complete their development. Because the foliage and roots are toxic and unpleasant-tasting, mammalian herbivores do not feed on this plant. The method of seed dispersal for this plant is something of a mystery, although it has been speculated that small rodents may carry the the seeds to caches, where they are eaten as food. Because such rodents have short life spans, not all of the seeds are eaten (Allard, 2002).
Photographic Location: A woodland in southern Illinois. The photographed plant is an example of the typical variety, or Aristolochia serpentaria serpentaria. Comments: It is possible to identify Virginia Snakeroot (Aristolochia serpentaria) by the shape of its leaves and its relatively low stature. The flowers of this plant resemble those of Woolly Pipevine (Aristolochia tomentosa) and Dutchman's Pipe (Aristolochia macrophylla), although the flowers of Virginia Snakeroot are smaller in size and they are held much closer to the ground. The latter two plants are much longer vines that are distributed primarily in SE United States, although Woolly Pipevine also occurs as a native plant in the southern tip of Illinois. These two vines are also cultivated occasionally. Some authors have assigned Virginia Snakeroot to the Endodeca genus, although this classification is not universally accepted. For example, Mohlenbrock (2014) refers to the typical variety of this plant as Endodeca serpentaria, while the narrow-leaved variety is referred to as Endodeca hastata. There is also disagreement about whether or not plants with narrow leaves are worthy of status as a variety or a distinct species.
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Miss Chen
2018年05月02日
Miss Chen
Description: This perennial plant is about 1-2' tall. It consists of 1-2 trifoliate leaves with long petioles and a stout peduncle (or stalk) with a single flower at its apex. Both the petioles and the peduncle develop directly from the corm; the peduncle is wrapped by a sheath at its base and it is shorter than the petioles. They both have a smooth hairless surface, and their color varies from light green to reddish green or brownish green. The light green to dark green leaflets are up to 7" long and 3" across; they are ovate or broadly rhombic, pinnately veined, glabrous, and smooth along the margins. The terminal leaflet is larger than the lateral leaflets. Jack-in-the-Pulpit is usually monoecious, but some plants are unisexual and they have the capability to change their gender. The whitish green to reddish green flower is about 3½" long and 2" across, consisting of a spadix and spathe. The light green spadix is cylindrical in shape; the male flowers are located above the female flowers on the lower half of the spadix, where they are hidden from view by the surrounding spathe. These flowers are tiny in size and they lack corollas and calyxes. The male flowers have several stamens, while the female flowers have a single pistil. The spathe loosely surrounds the spadix, exposing only its upper portion (the "Jack" of the flower). The upper part of the spathe develops behind the spadix and then curves over it, providing a protective hood (the "Pulpit" of the flower). This spathe varies from light green to reddish green in color; its tubular base is slightly furrowed and often has white or burgundy stripes. The blooming period occurs from mid- to late-spring and lasts about 2 weeks, although the spadix and spathe remain attractive for a longer period of time. The flowers may emanate a faint scent that resembles stagnant water or fungi; if so, it is difficult to detect through the human nose. If cross-pollination occurs, each fertilized flower will develop a fleshy red fruit about ¼" across; this fruit contains one or more seeds. Collectively, these fruits can form an ovoid mass up to 2" long. The root system consists of a corm up to 1½" across with secondary roots. Cultivation: The preference is dappled sunlight to light shade during the spring, when vegetative growth and flowering occurs; medium shade is tolerated later in the year. The soil should be moist to mesic and contain an abundance of organic material from decaying leaves and other material. It is easier to start plants from corms, rather than seeds.
Range & Habitat: The native Jack-in-the-Pulpit is a fairly common plant that occurs in every county of Illinois (see Distribution Map). Habitats include mesic deciduous woodlands and shady hillside seeps. This species typically occurs in original woodlands that have never been subjected to the plow or bulldozers. Faunal Associations: The flowers are pollinated by fungus gnats (Sciaridae & Mycetophilidae) and the larvae of parasitic thrips. In particular, the oligolectic thrips Heterothrips arisaemae and probably Ctenothrips bridwelli are attracted to the flowers of Jack-in-the-Pulpit. The foliage and corms (especially the latter) contain crystals of calcium oxalate, which can cause a burning sensation in the mouth and irritation of the gastrointestinal tract. As a result, mammalian herbivores rarely eat this plant. However, some upland gamebirds feed on the foliage occasionally, including Meleagris gallopavo (Wild Turkey). The red berries are eaten by some woodland birds, including Hylocichla mustelina (Wood Thrush) and the Wild Turkey.
Photographic Location: The photographs were taken at Busey Woods in Urbana, Illinois, and at a woodlands near Kickapoo State Park in Vermilion County, Illinois. Comments: Jack-in-the-Pulpit is a favorite woodland wildflower because of its curious flowers. The closest relative of this species is Arisaema dracontium (Green Dragon). Green Dragon also occurs in moist to mesic woodlands, but it is less common in Illinois. Each flower of Green Dragon has a long narrow spadix that protrudes above the spathe; the latter is narrowly cylindrical. The foliage of these two species differs as well: Jack-in-the-Pulpit has compound leaves with 3 leaflets, while Green Dragon has compound leaves with 5-13 leaflets. The leaflets of the latter are more narrow than those of Jack-in-the-Pulpit. In southern Illinois, there is a rare subspecies of Jack-in-the-Pulpit, Arisaema triphyllum pusillum, that is a dwarf version of the typical subspecies.
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Miss Chen
2018年05月02日
Miss Chen
Close-up of InflorescenceDescription: This herbaceous perennial plant is 1½–2½' tall. It consists of a single basal leaf and single flowering stalk. The basal leaf has a long stout petiole that is up to 2' long and erect. This petiole is pale green, glabrous, and glaucous. The basal leaf is up to 2½' long and 2' across; it divides into 5-13 leaflets that are parallel with the ground. Each leaflet is up to 8" long and 2½" across, narrowly ovate, smooth along the margins, glabrous, and dark green. The 2 terminal leaflets may be deeply cleft into 2 or 3 lobes that resemble smaller leaflets. The naked flowering stalk is about ½–1' tall (not including the flower); it is whitish green, unbranched, erect, and hairless. At the apex of this stalk is a single flower that consists of a spathe and spadix. The spathe is about 2" long, pale green, glabrous, and glaucous. This spathe wraps around the base of the spadix, but it is partially open and pointed at the top. The spadix is about 6-12" long. The lower portion of the spadix is about 2" long and nearly surrounded by the spathe; it is cylindrical in shape and bears the male and/or female flowers. Most plants are monoecious with separate male and female flowers, but sometimes they are unisexual. The male flowers occur above the female flowers; they are both rather small and inconspicuous. The upper portion of the spadix is about 4-10" long and tapers gradually to a point. It is usually whitish green and remains more or less erect. The blooming period occurs during late spring and early summer and the flowers remain attractive for about a month. They may release a fungus-like scent that is not detectable by the human nose. Each flower is replaced by an ovoid mass of berries, which become orange-red by the end of the summer. The root system consists of a corm with secondary roots. This plant can spread by forming offsets or by reseeding itself. Cultivation: The preference is dappled sunlight during the spring and light shade during the summer. The soil should be moist and loamy with a layer of decaying leaves. This plant adapts to shady areas underneath trees and doesn't like to dry out. It has few problems with disease and insect pests. Range & Habitat: The native Green Dragon occurs occasionally throughout most of Illinois, although it is uncommon or absent in the NW area of the state (see Distribution Map). Habitats include moist deciduous woodlands, shady seeps, and wooded areas adjacent to springs and vernal pools. The presence of this species is an indication that the original woodland flora is still intact. Green Dragon often occurs in the same habitats as the closely related Arisaema triphyllum (Jack-in-the-Pulpit), but the latter species is the more common of the two. Faunal Associations: The flowers of Green Dragon attract simple flies (Nematocera), particularly fungus gnats. A thrip species, Ctenothrips bridwelli, has been observed feeding on Green Dragon in Illinois. The berries are eaten by the Wild Turkey, Wood Thrush, and possibly other woodland birds. Mammalian herbivores, including White-Tailed Deer, rarely feed on the foliage and corms as they are highly toxic. The toxic agent is calcium oxalate, which causes a burning sensation in the mouth, gastrointestinal distress, and possible damage to the kidneys.
Photographic Location: Near a vernal pool at Busey Woods in Urbana, Illinois. Comments: Green Dragon is an attractive foliage plant for shady places and the unusual flowers are interesting as well. This species resembles Arisaema triphyllum (Jack-in-the-Pulpit) somewhat, but the latter has only 3 leaflets per compound leaf. There are also differences in the structure of their flowers: the spadix of Green Dragon is much longer and strongly exerted from the spathe, while the spathe of Jack-in-the-Pulpit forms a hood over the spadix.
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Miss Chen
2018年05月02日
Miss Chen
Description: This perennial wildflower is about 1½' tall and 2' across. A single compound leaf and the inflorescence develop from a short stalk that is less than 1" long. The slender petiole of this leaf is about 1–1¼' long and erect; it is light green to dark red and glabrous. The blade of the compound leaf is divided into 3 segments; each of these segments is pinnately compound, consisting of 3-7 leaflets. The leaflets are up to 5" long and 2" across; they are ovate to obovate, medium green, hairless, and finely serrated along their margins. The inflorescence consists of a branching stalk of several umbels (usually 3); this inflorescence is about ¾' tall and hidden from above by the leaflets. Each globoid umbel spans about 1½–2" across, consisting of about 40 small flowers and their pedicels. The pedicels are pale green and glabrous or pubescent. Each greenish white flower is about 1/8" (3 mm.) across, consisting of 5 petals, 5 stamens, a pistil with 5 styles, and insignificant sepals. When the flower opens, the petals become strongly recurved. The strongly exerted stamens have white filaments and white anthers. The styles are very short and appressed together in the center of the flower. The ovoid-oblongoid ovary is shiny green. The blooming period occurs during late spring to early summer and lasts about 2-3 weeks. The flowers are replaced by small blue-black berries; each fleshy berry is about ¼" across and contains 5 seeds. The root system consists of a vertical rootstock with fibrous secondary roots; long horizontal rhizomes are produced occasionally, from which clonal plants develop. Cultivation: The preference is light shade, mesic conditions, and loamy, rocky, or sandy soil containing some loose organic matter. Range & Habitat: The native Wild Sarsaparilla is occasional in northern Illinois, uncommon in west-central Illinois, and absent from the rest of the state (see Distribution Map). Habitats include rich woodlands, rocky woodlands, sandy woodlands, swamps, and forested bogs. This species adapts to a variety of wooded habitats.
Faunal Associations: Unfortunately, information is lacking about flower-visiting insects. The caterpillars of Papaipema araliae (Aralia Shoot Borer Moth) bore through the stems. The berries of Aralia spp. are eaten by some woodland songbirds, including the White-Throated Sparrow, Swainson's Thrush, and Wood Thrush. The berries of Aralia spp. are also eaten by some mammals, including the Red Fox, Eastern Skunk, and Eastern Chipmunk. Photographic Location: A rocky woodland at The Potholes in west-central Indiana. Comments: At one time, the roots of Wild Sarsaparilla were used as a substitute for genuine Sarsaparilla to flavor root beer, hence the common name of this woodland wildflower. Wild Sarsaparilla is related to the better known Panax quinquefolius (American Ginseng). This latter species differs from Wild Sarsaparilla by its palmate leaflets and red berries. Other Aralia spp. in Illinois are, in most cases, woody shrubs or trees. An exception is Aralia racemosa (American Spikenard), which is a much larger plant with more leaflets (9-21) per leaf segment.
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Miss Chen
2018年05月01日
Miss Chen
Description: This herbaceous perennial plant is 1-3' tall and sparingly branched. The round stems are green to reddish green and glabrous or pubescent. At first, only basal leaves are produced, but later there are alternate leaves along the stems. These leaves are ternately compound (divided into groups of 3 leaflets) and they have long petioles that are glabrous or pubescent. Each leaflet is up to 3" long and 2" across; it is usually obovate in shape with a wedge-shaped bottom, but it divides into 3 rounded lobes. Each of these lobes is often subdivided into several secondary lobes, resembling large rounded teeth. The upper surface of each leaflet is glabrous and there may be areas with a whitish bloom. The leaflets can be sessile or stalked. The upper stems produce flowers individually or in groups of 2-3. Each flower is about 1½" long and it hangs downward from a long stalk. This flower has 5 petals, 5 petal-like sepals, and strongly exerted stamens and styles. Each petal is yellow and rounded toward the tip, but its base consists of a long nectar spur that is pale red to purplish red. The sepals are ovate in shape and they are the same color as the nectar spurs. The nectar spurs of mature flowers are erect (parallel to each other) or slightly spreading. The anthers of the stamens are bright yellow. The blooming period occurs from late spring to early summer and lasts about a month. There is no floral scent. Each flower is replaced by 5 pod-shaped follicles that have long beaks. Each follicle splits open along one side to release the shiny black seeds. The root system is fibrous and rhizomes are occasionally produced. Cultivation: The preference is light shade to partial sun, moist to dry conditions, and soil that is loamy, rocky, or slightly sandy. Mature plants can also tolerate full sun, although young plants require some shade from neighboring vegetation. Once it becomes established, this plant is easy to maintain.
Range & Habitat: The native Wild Columbine occurs occasionally in most areas of Illinois, although it is uncommon or absent in south-central Illinois (see Distribution Map). Habitats include rocky open woodlands, wooded slopes, sandy savannas, thinly wooded bluffs, partially shaded areas of cliffs, limestone glades, fens and bogs, openings in logged woodlands, and areas along railroad tracks. Occasional wildfires and other kinds of disturbance in wooded areas are probably beneficial in maintaining populations of this plant. Faunal Associations: Bumblebees and the Ruby-Throated Hummingbird visit the flowers for nectar; bumblebees may also collect pollen for their larvae. Short-tongued Halictid bees collect pollen from the flowers, but they are less effective at cross-pollination. The larvae of various insects feed on Wild Columbine, including those of Erynnis lucilius (Columbine Duskywing), Papaipema leucostigma (Borer Moth sp.), Pristophora aquiligae (Columbine Sawfly), and several Phytomyza spp. (Leaf Miner Flies). Because the foliage is toxic, it is little bothered by mammalian herbivores.
Photographic Location: Along a cliff at the Shady Rest Nature Preserve in Piatt County, Illinois. Comments: This is the only Aquilegia sp. (Columbine) that is native to Illinois. Other species in this genus occur in the Western states. The flowers of Wild Columbine are colorful and attractive, and the foliage is attractive as well. The cultivated Columbines that are sold by nurseries usually have Aquilegia vulgaris (European Columbine) as one or both of the parents. European Columbine rarely escapes from cultivation. It can be distinguished from Wild Columbine by spreading nectar spurs and weakly exerted stamens. While the flowers of Wild Columbine are always some shade of red, the flowers of cultivated Columbines are often other colors, including pink and blue.
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Miss Chen
2018年05月01日
Miss Chen
Description: This terrestrial orchid develops a single basal leaf during the fall that persists through the winter until the flowering period beginning in late spring. This basal leaf is 3½-8" long and 1-3" across; it is broadly elliptic or oblong-ovate in shape and smooth along the margins. The orientation of the basal leaf is ascending to horizontal with the ground. The upper leaf surface is dark green with fine white veins and glabrous; the veins are parallel to each other. The lower leaf surface is green, purplish green, or dull purple. At the base of the leaf, there is a short petiole that pokes above the ground surface. This basal leaf originates from the oldest corm of the root system. During the late spring or early summer, the basal leaf withers away and a raceme of flowers about 6-20" tall is sometimes produced. Each raceme will have about 8-16 flowers; they are laxly distributed along the flowering stalk. A large majority of plants fail to produce flowers during any given year, either because they are too small and immature, or environmental conditions are unfavorable.
The flowering stalk is pale green or pale purplish green, terete, and glabrous; it is surrounded by a tight basal sheath toward its base. The flowers are about ¾-1" long and a little less across, consisting of 3 sepals, 3 petals, and the reproductive organs; nectar spurs are lacking. The sepals spread outward from the center of the flower to a greater or lesser degree, and they are more or less equally spaced from each other. These sepals are narrowly oblanceolate or narrowly oblong, pale green or pale yellow, becoming purplish toward their tips. The two upper petals are narrowly oblanceolate or narrowly oblong and colored similarly to the sepals; these petals are adjacent to each other, functioning as a protective hood over the reproductive organs. The lower petal is the lip of the flower; it is oblanceolate or obovate and primarily white with speckles of purple or magenta. The lip is depressed in its center and its margins are elevated and undulate. The relatively stout pedicels of the flowers are about ¾" long, while the floral bracts are less than ¼" long and early-deciduous. The blooming period lasts about 2-3 weeks (late spring to early summer) and the flowers lack noticeable fragrance. In the absence of insect pollination, they are self-fertile. Afterwards, the flowers are replaced by seed capsules about ¾-1" long that are broadly ellipsoid in shape with multiple narrow ridges along their sides. These capsules nod downward from their pedicels along the raceme; later in the year, they split open to release abundant tiny seeds. These seeds are easily distributed to new areas via wind currents. The root system consists of 1-4 bulbous corms that are connected by slender rhizomes. These corms are up to 1" across and individually they can persist for 2 years. On a healthy plant, a new corm is produced each year. Fibrous roots originate from the bases of the corms. Small colonies of clonal plants can develop from the spread of these corms. Cultivation: The preference is dappled sunlight during the fall, winter, and spring; light levels during the summer are unimportant because live leaves are not present during this time of year. Significant photosynthesis can occur in temperatures that are only slightly above freezing. The root system of this orchid benefits from (and may require) a symbiotic relationship with compatible mycorrhizal fungi. Otherwise, this orchid may fail to flourish. It can be slowly propagated by separating its corms to establish new plants. Propagation by seed is very difficult and rarely successful. A moist to mesic loamy soil with abundant organic material is preferred. Soil pH can vary from mildly acidic to neutral.
Range & Habitat: The native Putty-Root Orchid is occasional toward the southern tip of Illinois, while in the rest of the state it is uncommon or absent (see Distribution Map). In spite of its lack of abundance, this is one of the more common orchids within the state. Habitats include rich mesic woodlands, wooded areas (e.g., terraces) above streams, damp depressions in upland rocky woodlands, the bottoms of sandstone canyons, areas near the bases of wooded slopes, and the bottoms or lower slopes of ravines. The Putty-Root Orchid is specifically adapted to deciduous woodlands where such canopy trees as Sugar Maple (Acer saccharum) and American Beech (Fagus grandifolia) are present. It is found in above average to high quality natural areas. Such invasive species as Garlic Mustard (Alliaria petiolata) and Japanese Stiltgrass (Microstegium vimineum) present a significant threat to maintaining populations of this orchid within the state should they continue to spread. Faunal Associations: Various bees are likely pollinators of this orchid. A Halictid bee, Lasioglossum oblongum, has been observed visiting the flowers. Such insects are lured to this orchid's flowers by deception, as no nectar is present to reward such floral visitors. There is a potential risk of White-tailed Deer browsing on the flowering stalks and basal leaves, but more specific information about this is currently unavailable. Photographic Location: A hilly woodland in east-central Illinois; the photographed orchid was located at the base of a wooded slope on a terrace above a stream.
Comments: The flowers of this orchid are reasonably attractive, although their muted colors can make them difficult to spot in a woodland. The basal leaf is also attractive, which persists during the winter while disappearing during the summer! This odd characteristic takes advantage of the greater amount of light that is available when deciduous trees are leafless. In the past, a mucilaginous substance was obtained from the bulb-like corms that could be used to repair pottery and crockery, hence the name 'Putty-Root.' Another common name of this orchid is 'Adam-and-Eve,' which refers to the pair of corms that are connected together by a slender rhizome in the root system. The range of the Putty-Root Orchid partially overlaps a similar species, the Cranefly Orchid (Tipularia discolor), and it is possible to confuse these two species. The flowers of Putty-Root Orchid lack nectar spurs, while the flowers of Cranefly Orchid have nectar spurs that are long and slender. The racemes of the latter orchid tend to have more flowers (12-30) and these flowers are more white than those of the Putty-Root Orchid. There are also differences in the appearance of their basal leaves. The basal leaf of Putty-Root Orchid has white veins on a dark green background, while the basal leaf of Cranefly Orchid lacks white veins. The basal leaf of this latter orchid is also shaped differently (a little shorter and more wide) and its underside is usually a deeper shade of purple.
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Miss Chen
2018年05月01日
Miss Chen
Description: This perennial wildflower is 4-8" tall. A non-flowering plant produces a whorl of trifoliate basal leaves on slender stems; each basal leaf typically has 3 leaflets on a long slender petiole. The basal stems are light green to reddish purple, unbranched, terete, and hairless; the stems of flowering plants are similar. Individual leaflets are up to 1½" long and 1" across; they are obovate or broadly oblong in shape. The outer margin of each leaflet has 3 blunt lobes, otherwise the margins are usually smooth. Sometimes there are 1-2 blunt teeth along the outer margin of a leaflet. The upper surface of each leafletFlowers is medium green to purplish green and hairless, while the lower surface is pale green and hairless. A reticulate network of veins is conspicuous on the lower surface. At the base of each leaflet, there is a slender stalk (petiolule) about ¼" long. Toward the middle of its stem, a flowering plant sometimes produces a whorl of cauline leaves that resembles the whorled basal leaves. At its apex, this stem terminates in a whorl of trifoliate leaves or simple leaflets (sometimes including a combination of the two). These terminal leaves and leaflets resemble the leaves and leaflets of the basal and cauline leaves. Immediately above the terminal leaves or leaflets is a loose umbel of 1-5 flowers. The slender pedicels of the flowers are up to 1½" long. The diurnal flowers are ½–1" across; the central flower is usually a little larger in size than any lateral flowers. Each flower has 5-10 petal-like sepals, a dense cluster of small green pistils in the center, and a ring of conspicuous stamens. The petal-like sepals are white or pinkish white, while the stamens have white filaments and yellow anthers. There are no true petals. The blooming period occurs from mid- to late spring for about 3 weeks. Each flower is replaced by a cluster of 4-15 achenes. Each achene is about 1/3" (8 mm.) in length, terminating in a slightly hooked beak. Inside each achene, there is a single seed. The root system consists of fibrous roots; the upper roots near the base of a plant are somewhat fleshy and swollen. This wildflower spreads by reseeding itself. Cultivation: Rue Anemone is best planted under deciduous trees. It prefers dappled sunlight during the spring, but tolerates considerable shade later in the year. Moisture levels should be mesic to slightly dry, and the soil should contain loose loam and rotting organic material. Most growth and develop occurs during the spring; it is not aggressive. Range & Habitat: Rue Anemone is occasional throughout Illinois (see Distribution Map), where it is native. Habitats include mesic to dry deciduous woodlands, wooded slopes, and thinly wooded bluffs. This wildflower is usually found in above-average to high quality woodlands where the original ground flora is largely intact. Faunal Associations: The flowers offer only pollen as a reward to insect visitors. Typical floral visitors include various bees, Syrphid flies, and bee flies (Bombyliidae); the bees usually collect pollen, while the flies feed on pollen. Some of these insects explore the showy flowers for nectar in vain. Honeybees, little carpenter bees (Ceratina spp.), cuckoo bees (Nomada spp.), mason bees (Osmia spp.), Halictid bees, and Andrenid bees have been observed as visitors to the flowers. Because the foliage is toxic and relatively inconspicuous, it is usually ignored by mammalian herbivores.
Photographic Location: Near the top of a wooded slope in Vermilion County, Illinois. Comments: Rue Anemone (Anemonella thalictroides) is one of many showy wildflowers that develop in deciduous woodlands during the spring. Both the flowers and foliage are quite attractive. Because the flowers move around easily in the wind, it is sometimes called 'Windflower.' Another scientific name of this species is Thalictrum thalictroides. Rue Anemone resembles Enemion biternatum (False Rue Anemone), but its flowers have more petaloid sepals (typically 6-9), while the flowers of False Rue Anemone have only 5 petaloid sepals. Furthermore, its leaves and flowers are arranged in whorls to a greater extent than those of False Rue Anemone. While Rue Anemone is sometimes assigned to the Thalictrum genus, other Thalictrum spp. in Illinois are much larger plants with wind-pollinated dioecious flowers. The leaflets of these species are similar to those of Rue Anemone, however their flowers are quite distinct.
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Miss Chen
2018年05月01日
Miss Chen
Description: This herbaceous perennial wildflower is about 2-4' tall; in open areas, it usually branches and has a bushy appearance. The stems are light green, terete, glabrous, and glaucous. The alternate leaves are up to 6" long and 2½" across; they are ovate to narrowly ovate, smooth along the margins, and usually hairless. The upper surface of each leaf is bright green, and glabrous, while the lower surface is pale green. Rarely, the lower surfaces of the leaves are pubescent. Each leaf has a slender petiole up to 1" long. The upper stems terminate in compact panicles of flowers. Each flower spans ½–¾" across, consisting of a tubular corolla with 5 widely spreading lobes and a very short calyx with 5 triangular teeth. The corolla is mostly pale blue and its lobes are narrow and star-like. Near the base of each lobe, there is a small patch of white or pale yellow. The narrow throat of each corolla is guarded by a ring of white hairs that face inward (probably to keep out ants & other nectar thieves). The branches of the panicle are green and hairless, becoming dark brown or black with age. The blooming period occurs from mid-spring to early summer and lasts about a month. There is no noticeable floral scent. Each fertilized flower is replaced by a pair of cylindrical follicles that are about 4-5" long. The follicles are glabrous and erect to ascending. Each follicle contains a a single row of small cylindrical seeds; it splits along one side to release them. The root system consists of a taproot. This wildflower spreads by reseeding itself.
Cultivation: The preference is full sun to light shade and moist conditions. Different soil types are tolerated, including those that contain clay-loam, rocky material, or sand. The foliage is rarely disfigured by herbivores or disease. More flowers are produced if there is some exposure to the sun. Range & Habitat: The native Bluestar is occasional in southern and western Illinois; it is absent elsewhere (see Distribution Map). Habitats include rocky woodlands, shaded rocky ravines, gravelly seeps, borders of streams, limestone glades, and moist sandy meadows. Because of its attractive foliage and flowers, Bluestar is occasionally cultivated in gardens, from which it can escape. This is the only native Amsonia sp. in Illinois; other species in this genus are native to areas south of Illinois.
Faunal Associations: The nectar of the flowers attracts the Ruby-throated Hummingbird and various long-tongued insects. These insect visitors include the Large Carpenter Bee (Xylocopa virginica), Hummingbird moths (Hemaris spp.), and various butterflies. An aphid, Macchiatiella rhamni, uses Bluestar as a summer host (Hottes & Frison, 1931). Because the foliage contains a white latex that is toxic, it is avoided by mammalian herbivores. Photographic Location: A wet prairie at Meadowbrook Park in Urbana, Illinois.
Comments: The star-like flowers are a heavenly shade of light blue and the foliage is an attractive bright green. No other native plant in Illinois resembles this species. The closest relatives of Bluestar in Illinois are Apocynum cannabinum (Common Dogbane) and Apocynum androsaemifolium (Spreading Dogbane). These latter two species have white to pinkish white flowers that are bell-shaped and smaller in size. While Bluestar has alternate leaves, Common Dogbane and Spreading Dogbane have opposite leaves. Sometimes other Amsonia spp. (Bluestars) are occasionally cultivated in gardens. They differ from the Bluestar that is described here by the shapes of their flowers and leaves. Another common name of Amsonia tabernaemontana is Blue Dogbane.
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Miss Chen
2018年05月01日
Miss Chen
Description: This herbaceous perennial plant produces basal leaves 4-9" long and 1½-3½" across on short petioles (usually 2-3 per bulb). The basal leaves are ovate-oval to ovate-elliptic, light to medium green, hairless, and smooth along the margins. Their petioles are reddish, hairless, and wrapped in a basal sheath below. These leaves develop during the spring and wither away by early summer. During early to mid-summer, there develops a naked flowering stalk about ½-1½' tall. This stalk is terete, glabrous, and reddish to pale green; at its base, there is a papery sheath. The stalk terminates in a single rounded umbel of flowers spanning 1-2" across; there are typically 20-40 flowers per umbel. At the base of this umbel, there is a pair of deciduous bracts. Each flower is about ¼" across, consisting of 6 white to translucent white tepals, a light green to pale yellow ovary, 6 stamens with pale yellow anthers, and a single white style. At the base of each flower, there is a slender pedicel that is white to greenish white. The blooming period occurs during the summer and lasts about 2 weeks. Both the flowers and foliage exude an onion-like odor. After the blooming period, the ovary of each flower matures into a 3-celled seed capsule; each cell contains a single globoid seed that becomes black at maturity. The root system consists of an ovoid bulb with fibrous roots at its base. Offsets often develop, producing clonal colonies of plants. Cultivation: The preference is dappled sunlight during the spring when the basal leaves develop, while during the summer considerable shade is tolerated as the basal leaves have withered away. The soil should consist of a rich loose loam with abundant organic matter, while moisture levels should be more or less mesic. It is easiest to introduce new plants into an area by dividing and transplanting the bulbs during the fall. Range & Habitat: The native Wild Leek occurs occasionally in central and northern Illinois, while in the southern section of the state it is rare or absent (see Distribution Map). Habitats include mesic deciduous woodlands and wooded bluffs. The presence of this species is a sign that the original flora of a woodlands is still in intact. An introduced species, Alliaria petiolata (Garlic Mustard), can shade out the basal leaves of Wild Leek during the spring, causing the latter to decline in abundance.
Faunal Associations: The flowers attract various kinds of bees, including Halictid bees, masked bees (Hylaeus spp.), honeybees, bumblebees, and mason bees. These insects suck nectar or collect pollen. To a lesser extent, the flowers are visited by Syrphid flies, which suck nectar or feed on pollen. Occasionally, the maggots of some flies feed on the bulbs of some Allium spp. (Onions), although not necessarily Wild Leek; these species include Delia antiqua (Onion Maggot), some Eumerus spp., and some Tritoxa spp. The plant bugs, Lindbergocapsus ainsliei and Lindbergocapsus allii, also feed on Allium spp. (Onions). Another species, Thrips tabaci (Onion Thrips), sucks juices from the foliage. Deer and other mammalian herbivores rarely browse on the foliage of Wild Leek. Photographic Location: A mesic deciduous woodlands at Busey Woods in Urbana, Illinois.
Comments: This woodland wildflower is somewhat unusual because its foliage has withered away by the time the flowers bloom. Both the foliage and flowers are attractive; the latter help to brighten the gloomy corners of woodlands during the summer. Wild Leek has the widest basal leaves (1½–3½" across) of any Allium sp. in the state. A similar species, Allium burdickii (which is also called 'Wild Leek'), has basal leaves that are about ½-1½" across. Other wild Allium spp. have leaves that are narrow and strap-like (less than ½" across). Wild Leek has about 20-40 flowers in each umbel, while Allium burdickii has 10-20 flowers in each umbel. Wild Leek has reddish leaf petioles and flowering stalks that are often reddish at the base, while the petioles and stalks of Allium burdickii are light green throughout. This latter species is restricted to wooded areas in NE Illinois and it is less common.
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