Flora of North America species comparison

erect or ascending, to 300 cm, pubescent or glabrescent.

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

trifoliolate;

stipules usually persistent, narrowly ovate-deltate, 5–10 mm;

petiole usually 15–20 mm;

leaflet blades elliptic to ovate, apex obtuse or acute, surfaces finely spreading-villosulous to substrigose abaxially, uncinate-puberulent or glabrescent adaxially;

terminal blade 20–90 × 15–45 mm, length 1.5–4 times width.

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.

unbranched;

rachis densely patent uncinate-pubescent;

primary bracts caducous, narrowly ovate, 6–7 mm.

often numerous, slender and flexuous, branched or unbranched;

rachis densely uncinate-puberulent and villous;

primary bracts narrowly ovate, 1–2 mm.

persistent with calyx-remnant at top after loments drop, 5–9 mm.

4–10 mm.

calyx 2–3.5 mm, uncinate-puberulent, lobes pilose, tube 1 mm;

abaxial lobes 1.5–2.5 mm, lateral lobes 1–2 mm;

corolla purple, 5–8 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.

sutures symmetrically crenate abaxially, straight or slightly sinuate adaxially;

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

segments 4–8, semiobovate, 3.5–5 × 2.5–3 mm, broadly rounded abaxially, straight or barely convex adaxially, uncinate-puberulent;

stipe 1.5–2 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.

= 22.

= 22.