Flora of North America species comparison

ascending to erect, branched, 30–80 cm, inconspicuously uncinate-puberulent or glabrescent.

erect or ascending, usually striate, 30–100(–150) cm, glabrous or sparsely to densely uncinate-puberulent or conspicuously pilose or glabrescent.

unifoliolate;

stipules ± persistent, narrowly ovate-deltate, 3–3.5 mm;

petiole 6–11 mm;

leaflet blades ovate to narrowly ovate, 30–80 × 10–30 mm, length (2–)2.5–5 times width, apex acute or obtuse, with paler patches along midrib adaxially, surfaces uncinate-puberulent and villous.

trifoliolate;

stipules caducous, subulate to narrowly ovate-deltate, 2–6 mm;

petiole (10–)20–50 mm;

leaflet blades polymorphic, linear, narrowly ovate, narrowly ovate-oblong, ovate, broadly ovate to subrounded, or rhombic, usually thin, rarely thick, papery, apex acute to obtuse, surfaces closely to subdensely appressed pilose, inconspicuously reticulate-veined abaxially, sparsely appressed-puberulent and pilose adaxially;

terminal blade 20–100 × 8–65 mm, length 1–8 times width.

often numerous, slender and flexuous, branched or unbranched;

rachis densely uncinate-puberulent and villous;

primary bracts narrowly ovate, 1–2 mm.

terminal panicles and axillary racemes, branched, very diffuse;

rachis moderately to densely uncinate-puberulent to -pubescent;

primary bracts narrowly ovate, 1–3.5 mm.

4–10 mm.

(3–)6–12(–20) mm.

calyx 2.5–3 mm, puberulent and sparsely pilose, tube 1 mm;

abaxial lobes 2–3 mm, lateral lobes 2 mm, adaxial connate nearly to apex;

corolla pink to purple, 4–5 mm.

calyx 2–3 mm, pubescent, tube 1–1.5 mm;

abaxial lobes 2 mm, lateral lobes 1 mm;

corolla lilac to purple, 6–9 mm.

margins slightly involute when young, sutures crenate abaxially, sinuate adaxially;

connections adaxial, 1/5 as broad as segments;

segments 3–5, elliptic to obovate, 2.5–6 × 3–3.5 mm, rounded abaxially, convex adaxially, sparsely uncinate-puberulent, sutures glabrous;

stipe 1.5–2.5 mm.

sutures deeply crenate or dentate abaxially, sinuate adaxially;

connections adaxial, 1/5–1/3 as broad as segments;

segments (2 or)3–5, deltate to rhombic, (4–)5–10 × 3–5 mm, angled abaxially (sometimes obtusely), convex adaxially, uncinate-puberulent to -pubescent;

stipe 1–7 mm.

= 22.

= 22.