Flora of North America species comparison

erect, mostly unbranched, 30–300 cm, densely (sparsely in age) villosulous, also densely uncinate-puberulent and -pubescent.

trifoliolate;

stipules caducous, narrowly ovate to ovate, 3–7 mm;

petiole 15–40 mm;

leaflet blades broadly ovate or broadly rhombic, base acute to cuneate or truncate, apex acute to acuminate, surfaces densely velvety or villous, especially on veins abaxially, uncinate-puberulent and obscurely strigose on veins adaxially;

terminal blade 50–120(–150) × 35–90 mm, length 1–1.5(–2) times width.

branched or unbranched;

rachis uncinate-pubescent and sparsely villous;

primary bracts narrowly deltate, 3 mm, pilose.

3–9 mm.

calyx 2–3 mm, spreading-pilose, tube 2 mm;

abaxial lobes 2.5–4.5 mm, lateral lobes 2–4 mm;

corolla purple to pink or pallid lavender, 7–8 mm.

sutures subdentate abaxially, sinuate adaxially;

connections adaxial, 1/3–1/2 as broad as segments;

segments (3 or)4 or 5, rhombic, 5–8(–9) × 3–3.5 mm, symmetrically angled abaxially, straight or convex adaxially, moderately to densely uncinate-puberulent throughout;

stipe 3–6 mm.

= 22.