Flora of North America species comparison

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

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.

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.

10–20 mm.

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.

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).