Flora of North America species comparison

decumbent or prostrate, 50–100 cm, patent-villous and uncinate-puberulent.

erect or ascending, usually striate, 50–150 cm, usually glabrous, sometimes sparsely uncinate-pubescent or pilose.

usually trifoliolate, rarely unifoliolate;

stipules persistent, reflexed in age, deltate or ovate, 5–12 mm, base obliquely cordate, subamplexicaul;

petiole 10–35 mm;

leaflet blades ovate, ± leathery, apex obtuse or sometimes acute, surfaces prominently reticulate-veined adaxially, uncinate-puberulent on veins or glabrescent abaxially, uncinate-puberulent adaxially;

terminal blade 30–75 × 22–53 mm, length 1.2–2 times width.

trifoliolate;

stipules usually persistent, narrowly ovate or subulate, 10–20 mm;

petiole 40–70 mm;

leaflet blades ovate to broadly ovate, apex sharply acuminate to shortly cuspidate, surfaces glabrous (except veins spreading-villosulous);

terminal blade 50–120 × 30–70 mm, length 1.5–3 times width.

ascending to erect, axillary distally and unbranched, sometimes also terminal and branched;

rachis pilose and uncinate-puberulent;

primary bracts caducous, broadly ovate, 5–6 mm.

branched;

rachis densely uncinate-pubescent to rarely glabrescent;

primary bracts conspicuously covering apex of inflorescences, narrowly ovate, 8–14 mm.

10–20 mm.

4–8 mm, densely patent uncinate-puberulent and sparsely pilose.

calyx 3–4 mm, pilose and uncinate-puberulent, tube 1 mm;

abaxial lobes 3 mm, lateral lobes 1.2–1.5 mm, to 2.5 mm in fruit;

corolla white or ochroleucous, 7–8 mm.

calyx 3–4 mm, glabrate, margins sparsely ciliate, lobes pilose, tube 1.5–2 mm;

abaxial lobes 3–4 mm, lateral lobes 2–3 mm;

corolla purple, 8–12 mm.

sutures deeply crenate abaxially, crenate adaxially, contorted by irregular folding of margins near or at connection between segments;

connections adaxial, 1/5–1/4 as broad as segments;

segments 3–5, suborbiculate to subrhombic, 7–10 × 5–8 mm, symmetrically rounded abaxially, convex adaxially, glabrous, sutures uncinate-pubescent;

stipe 0 mm (or indistinctly stipitate by narrowing proximal segment).

sutures dentate abaxially, sinuate adaxially;

connections adaxial, 1/2 as broad as segments;

segments (1–)4–7, obliquely narrow-rhombic or suborbiculate, (7–)9–11 × 4–5 mm, angled abaxially, slightly convex adaxially, sparsely uncinate-puberulent, sutures densely uncinate-puberulent;

stipe 1–2.5 mm.