Flora of North America species comparison

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

erect or ascending, usually striate, angled, 30–90 cm, densely uncinate-puberulent.

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, linear-lanceolate, 1–4 mm;

petiole 3–13 mm;

leaflet blades somewhat paler abaxially, narrowly ovate-oblong, lateral slightly smaller than terminal, apex acute, lateral veins looped within margin, margins revolute, surfaces strigulose;

terminal blade 30–80 × 6–20 mm, length 3–5 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.

branched or unbranched;

rachis densely uncinate-puberulent;

primary bracts caducous, broadly deltate, 6 mm.

4–8 mm.

7–10 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.

calyx 4 mm, glabrous, tube 1.5–2 mm;

abaxial lobes 2 mm, lateral lobes 1.5–2 mm;

corolla purple, 10–12 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 ± deeply crenate abaxially, crenate adaxially;

connections slightly adaxial, 1/2 as broad as segments, sometimes contorted (twisted);

segments 2–5, elliptic, 5–6 × 3 mm, rounded abaxially, slightly rounded adaxially, uncinate-pubescent throughout;

stipe 1–2 mm.

= 22.