Flora of North America species comparison

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

prostrate, (50–)100–200(–300) cm, villous and 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, reflexed, broadly ovate, 5–12 mm, base obliquely cordate, subamplexicaul;

petiole 2–4.6 mm;

leaflet blades transversely elliptic, orbiculate, or broadly ovate, apex emarginate, retuse, rounded, or obtuse, surfaces densely spreading-villous abaxially, appressed-villous adaxially;

terminal blade 20–60 × 25–55 mm, length 0.8–1.2 times width.

unbranched;

rachis densely patent uncinate-pubescent;

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

terminal or axillary and erect, usually unbranched, rarely branched;

rachis shortly hirsute or sparsely uncinate-puberulent;

primary bracts broadly ovate, 5–6 mm.

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

(5–)10–15 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 (4–)5–6 mm, uncinate-puberulent and sparsely pilose, tube 1.5 mm;

abaxial lobes 3–5 mm, lateral lobes 3.5–4.5 mm;

corolla pink, fading blue-purple, 9–11 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, crenate adaxially;

connections adaxial, 1/6–1/4 as broad as segments;

segments 3–6(or 7), subrhombic to elliptic, 4.5–7.5 × 4–5 mm, reticulate, obtusely angled abaxially, convex adaxially, uncinate-puberulent throughout;

stipe 3–6 mm.

= 22.

= 22.