Flora of North America species comparison

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

slender, procumbent or decumbent, 20–100 cm, densely patent uncinate-puberulent and/or inconspicuously pilose.

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 persistent, obliquely ovate, 2–3.5 mm, base auriculate, amplexicaul;

petiole 10–20 mm;

leaflet blades usually ovate to shortly elliptic, rarely narrowly elliptic, apex obtuse, surfaces appressed-pubescent;

terminal blade usually 10–35(–50) × 7–30 mm, length (1.5–)2–3 times width.

unbranched;

rachis densely patent uncinate-pubescent;

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

lax-flowered, terminal and axillary, usually unbranched;

rachis densely spreading-pubescent;

primary bracts caducous, narrowly ovate, 1.5–2 mm.

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

3–10 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 1.5–2.5 mm, pilose, tube 1 mm;

abaxial lobes 1.5 mm, lateral lobes 0.7–1 mm;

corolla lavender-pink or reddish purple, banner with yellow spots, 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.

turgid, straight or curved, linear;

sutures equally shallow-undulate;

connections central, 2/3–3/4 as broad as segments;

segments 5–10, narrowly oblong or narrowly elliptic, 4–5 × 1.5 mm, rugose, not reticulate, symmetrically convex abaxially and adaxially, densely uncinate-pubescent throughout;

stipe 1 mm.

= 22.