Flora of North America species comparison

erect, ascending, or procumbent, usually striate, 30–60(–100) cm, sparsely to densely pilose and uncinate-pubescent.

prostrate or climbing, branched, angular (3-sided), 40–200 cm, uncinate-pubescent and villous.

trifoliolate, sometimes unifoliolate proximally;

stipules persistent, recurved, subulate, 2–3 mm;

petiole 7–25 mm;

leaflet blades usually oblong-ovate to narrowly so, sometimes broadly elliptic to oblong, apex obtuse or acute, surfaces sparsely uncinate-puberulent;

terminal blade 10–30(–35) × 8–10 mm, length 1–3.5 times width.

trifoliolate;

stipules usually persistent, sometimes caducous, ovate-deltate, 5.5–12 mm;

petiole 4–8 cm;

leaflet blades ovate, elliptic to broadly ovate, or rhombic, apex acute to acuminate, surfaces more densely sericeous abaxially, sparsely to densely sericeous adaxially;

terminal blade 35–100 × 24–60 mm, length 2.5–3 times width.

usually unbranched, sometimes branched;

rachis patent uncinate-puberulent;

primary bracts narrowly ovate, 2.5–3 mm.

branched or unbranched;

rachis patent-villous and uncinate-pubescent to puberulent;

primary bracts densely imbricate before anthesis, caducous, narrowly ovate, 7–10 mm.

8–15 mm.

4–8 mm.

calyx 1.5–2.5 mm, pubescent, tube 1 mm;

abaxial lobes 1.5 mm, lateral lobes 1 mm;

corolla pink-purple, 4–5 mm.

calyx 3–5 mm, sparsely puberulent throughout, lobes often villous, tube 1 mm;

abaxial lobes 4–5.5 mm, lateral lobes 2.5–4 mm;

corolla purple, fading blue-green, 7–9 mm.

sutures subequally crenate;

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

segments 2–7, rounded or broadly elliptic, 2.5–3 × 2.5 mm, abaxially and adaxially rounded, glabrous or slightly puberulent;

stipe 1–2 mm.

sutures crenate or somewhat angled abaxially, sinuate adaxially;

connections adaxial, 1/2 as broad as segments;

segments 5–9, semiorbiculate, 3–4 × 2–2.5 mm, obliquely rounded abaxially, slightly angled adaxially, uncinate-pubescent;

stipe 1–2 mm.

= 22.