Flora of North America species comparison

ascending to erect, 30–100 cm, medially villous, uncinate-puberulent and -pubescent, scarcely pilose.

trifoliolate;

stipules persistent, narrowly ovate or ovate, 3–6.5 mm;

petiole 5–30 mm;

leaflet blades ovate to narrowly ovate, base usually rounded, apex obtuse or acute, surfaces closely spreading-villous (often velvety) abaxially, slightly uncinate-puberulent on veins adaxially;

terminal blade 50–100 × 30–56 mm, length 1.5–2(–2.2) times width.

terminal and branched;

rachis patent uncinate-puberulent and pilose;

primary bracts ovate, 2–4 mm, usually villous.

4–10 mm.

calyx 2–3 mm, puberulent and sparsely pilose, tube 1 mm;

abaxial lobes 1.5–2 mm, lateral lobes 1 mm;

corolla purple or pink, 6–7 mm.

sutures deeply crenate abaxially, sinuate adaxially;

connections adaxial, 1/4–1/3 as broad as segments;

segments 2–4, semiorbiculate, 4–7 × 3–4.5 mm, rounded abaxially, convex adaxially, often somewhat angled when young, uncinate-pubescent throughout;

stipe 3–4 mm.