Flora of North America species comparison

prostrate, densely branched, 20–80 cm, ascending-pilose or strigose.

erect or ascending, branched, 50–200 cm, conspicuously or sparsely villous and uncinate-pubescent.

trifoliolate;

stipules persistent, narrowly ovate, 3–5 mm;

petiole 3–7.5 mm;

leaflet blades broadly obovate or cuneate-obovate, often folding downwards, apex emarginate, surfaces usually sparsely uncinate-puberulent or subappressed-pilose along midrib abaxially, rarely entire surface, glabrous adaxially;

terminal blade 5–10 × 3–11 mm, length 0.8–1.2 times width.

trifoliolate;

stipules mostly persistent, usually reflexed, broadly or narrowly ovate, 5–13 mm, base oblique, often auriculate, subamplexicaul;

petiole 30–60 mm;

leaflet blades ovate, thick, papery, apex acute to gradually acuminate, surfaces densely uncinate-puberulent abaxially, uncinate-puberulent and pubescent on veins adaxially;

terminal blade 50–130 × 30–100 mm, length 1.5–2 times width.

terminal fascicles opposite distal leaf, appearing axillary, unbranched;

rachis pubescent;

primary bracts narrowly ovate, 4 mm.

paniclelike, branched;

rachis densely patent bulbous-villous and uncinate-puberulent;

primary bracts caducous, narrowly ovate, 4–6 mm.

8–12 mm.

persistent, 8–13 mm.

calyx 2.5–3 mm, appressed-pubescent, tube 1.2 mm;

abaxial lobes 1.5–1.7 mm, lateral lobes 1.5–1.7 mm, adaxial lobes deeply 2-toothed;

corolla pale pink to purplish, 4–5 mm, keel distinctly longer than wings.

calyx 3–5 mm, sparsely or densely puberulent, tube 1 mm;

abaxial lobes to 3 mm, lateral lobes 1 mm;

corolla usually purple to pinkish, rarely white, 9–13 mm.

sutures weakly crenate abaxially, with broad connection between segments, barely sinuate adaxially;

connections 2/3–4/5 as broad as segments;

segments 3–5, nearly square, 2.5–3.5 × 2.5–3 mm, symmetrically convex abaxially, slightly concave adaxially, inconspicuously uncinate-pubescent or glabrescent;

stipe 0 mm.

sutures dentate or crenate abaxially, sinuate adaxially;

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

segments 4–6, broadly elliptic, 6.5–13 × 4–7 mm, obtusely angled abaxially becoming round, convex adaxially, uncinate-puberulent and villous, hairs particularly dense on sutures and between segments;

stipe 2.5–6 mm.

= 22.

= 22.