Desmodium tweedyi

Herbs, perennial. Stems ascending or erect, usually striate, angled, 30–100 cm, densely uncinate-puberulent to -pubescent and sparsely glutinous-pilose. Leaves trifoliolate; stipules persistent, ovate, 7.5–14.5 mm; petiole 40–90 mm; leaflet blades narrowly ovate to ovate or broadly ovate, thick, leathery, apex acute, usually pale-blotched along midrib adaxially, surfaces uncinate-puberulent to -pubescent and villous; terminal blade 40–120 × 20–66 mm, length 2 times width. Inflorescences branched or unbranched; rachis densely uncinate-puberulent to -pubescent and glutinous-villous; primary bracts ovate to broadly ovate, 7–10 mm. Pedicels 8–25 mm, patent uncinate-pubescent and pilose. Flowers: calyx 3–5 mm, puberulent and pubescent, ± glutinous, tube 1.2–1.5 mm; abaxial lobes 2.5–4 mm, lateral lobes 1.5 mm; corolla white, 7–8 mm. Loments: sutures nearly equally crenate; connections adaxial, 1/4 as broad as segments; segments (2 or)3–5(or 6), subrhombic, 6–8 × 4 mm, obtusely angled abaxially, somewhat angled adaxially, densely uncinate-pubescent throughout; stipe 2–4 mm.

Phenology: Flowering early summer.
Habitat: Woodlands near creeks, usually calcareous soils.
Elevation: 200–800 m.

Okla., Tex.

Discussion

Desmodium tweedyi is known from the Edwards Plateau area and north-central Texas northward to central Oklahoma.

Selected References

None.

Lower Taxa