Flora of North America species comparison

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

ascending or erect, usually striate, unbranched to inflorescence, 50–100 cm, uncinate-puberulent.

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.

trifoliolate;

stipules mostly persistent, linear to narrowly ovate-deltate, 2–5 mm;

petiole 6.5–18 mm;

leaflet blades linear to narrowly oblong, usually folded and appearing narrower, leathery, apex obtuse to acute, surfaces reticulate-veined adaxially, glabrous or sparsely puberulent abaxially, glabrous adaxially;

terminal blade 35–60(–80) × 4–7 mm, length 8–10 times width.

unbranched;

rachis densely patent uncinate-pubescent;

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

branched or unbranched;

rachis densely uncinate-puberulent to pubescent;

primary bracts narrowly lanceolate-triangular, 1.4–2 mm.

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

5–13 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 2.5–3.5 mm, uncinate-puberulent to pubescent on lobes, tube 1 mm;

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

corolla pink or purple, 4 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.

sutures deeply crenate abaxially, with narrow connection between segments, nearly straight adaxially, slightly sinuate at isthmus;

connections adaxial, 1/5 as broad as segments;

segments 1 or 2(or 3), semiorbiculate, 4.5–6 × 3–4 mm, symmetrically rounded abaxially, incipiently or plainly concave adaxially, densely uncinate-puberulent, more densely on sutures;

stipe 1.5 mm.

= 22.

= 22.