Desmodium illinoense |
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Illinois tickclover, Illinois ticktrefoil |
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Habit | Herbs, perennial. |
Stems | ascending to erect, branched or unbranched, 50–100 cm, medially uncinate-pubescent, sometimes also ± pilose. |
Leaves | trifoliolate; stipules persistent, ovate, 8–15 mm, base amplexicaul, pilose-ciliate; petiole 30–50 mm; leaflet blades narrowly ovate to ovate, thick, papery, apex acute to rounded, surfaces conspicuously reticulate-veined abaxially, uncinate-puberulent on veins abaxially, sparsely spreading-villous or glabrous adaxially; terminal blade 35–80 × 30–70 mm, length 1.5–3 times width. |
Inflorescences | usually unbranched; rachis patent-pilose and uncinate-puberulent; primary bracts narrowly ovate, 4–5 mm. |
Pedicels | 7–15(–23) mm. |
Flowers | calyx 4–5 mm, uncinate-puberulent and pilose, tube 2–3 mm; abaxial lobes 2.5 mm, lateral lobes 2 mm; corolla purplish, 6–8 mm. |
Loments | sutures equally crenate; connections central, 1/2–4/5 as broad as segments; segments 4–7, elliptic or suborbiculate, 4–7 × 3.5–5 mm, symmetrically convex abaxially and adaxially, densely uncinate-puberulent and villous; stipe 2–4 mm. |
Desmodium illinoense |
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Phenology | Flowering summer(–fall). |
Habitat | Prairie relics, thickets, roadsides. |
Elevation | 100–500 m. (300–1600 ft.) |
Distribution |
AR; IA; IL; IN; KS; MI; MN; MO; NE; OH; OK; SD; TX; WI
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Discussion | Desmodium illinoense is considered extirpated from Ontario, where it was collected once in 1888 near London. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Desmodium |
Sibling taxa | |
Synonyms | Meibomia illinoensis |
Name authority | A. Gray: Proc. Amer. Acad. Arts 8: 289. (1870) |
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