Flora of North America species comparison

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

ascending to erect, usually striate, branched or unbranched, 30–150 cm, glabrous or sparsely to densely uncinate-puberulent, sometimes also patent long-pilose.

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.

trifoliolate;

stipules caducous or moderately persistent, subulate to narrowly ovate, 2–5 mm;

petiole 1–30 mm;

leaflet blades narrowly ovate, elliptic, elliptic-ovate, ovate-rhombic, or suborbiculate, apex obtuse or acute, mucronulate, surfaces sparsely to densely uncinate-puberulent and appressed-villous abaxially, uncinate-puberulent or glabrescent adaxially;

terminal blade 9–75 × 6–33 mm, length 1.5–4(–5) times width.

branched or unbranched;

rachis patent-villous and uncinate-pubescent to puberulent;

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

terminal and branched, axillary and unbranched;

rachis uncinate-puberulent;

primary bracts ovate, 1.5–3 mm.

4–8 mm.

3–19 mm, uncinate-puberulent.

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.

calyx 1.5–2.5 mm, pubescent (not uncinate-puberulent), tube 1 mm;

abaxial lobes 1.2–1.5 mm, lateral lobes 1 mm;

corolla usually lavender to red-violet or pink-purple, rarely white, 4–6 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.

sutures crenate abaxially, sinuate adaxially;

connections adaxial, 1/4–1/2 as broad as segments;

segments 1–4, broadly elliptic, 3.5–5.5 × 2.5–4 mm, rounded abaxially, convex adaxially, uncinate-puberulent throughout;

stipe 1–2 mm.

= 22.

= 22.