Flora of North America species comparison

decumbent or decumbent-assurgent, branched, 30–120 cm, densely uncinate-pubescent.

ascending to erect, usually striate, mostly unbranched, 50–100(–150) cm, medially uncinate-puberulent and uncinate-pubescent.

tri-foliolate;

stipules caducous, narrowly ovate, 5+ mm;

petiole 20–30 mm;

leaflet blades ovate-elliptic to narrowly so, apex acute to obtuse, surfaces densely appressed-pubescent abaxially, sparsely so adaxially;

terminal blade (20–)35–60 × 8–10(–15) mm, length 2.5–4 times width.

trifoliolate;

stipules moderately persistent, narrowly ovate, 4–9.5 mm, apex often awn-tipped;

petiole 1–5 mm;

leaflet blades narrowly elliptic to linear, apex obtuse or acute, surfaces prominently reticulate-veined abaxially, uncinate-puberulent and subappressed pubescent abaxially, glabrate or sparsely pubescent adaxially;

terminal blade (30–)40–85 × 5–15 mm, length 4–10 times width.

axillary and terminal, branched or unbranched;

rachis patent uncinate-puberulent to pubescent;

primary bracts closely imbricate before anthesis, caducous, ovate, 5 mm.

terminal and branched;

rachis terete to subangulate, densely uncinate-puberulent and sparsely pilose;

primary bracts ovate, 2.5–3 mm.

5–10 mm.

2–5 mm.

calyx 3–4 mm, sparsely pubescent, tube 1 mm;

abaxial lobes 3 mm, lateral lobes 2 mm;

corolla pink or purple to blue, 7–9 mm.

calyx 2.5–3 mm, puberulent, tube 1.5 mm;

abaxial lobes ovate, 1.5 mm, lateral lobes ovate, 1 mm;

corolla pale lavender to reddish purple, 5 mm.

sutures undulate abaxially, sinuate adaxially;

connections adaxial, 1/4–1/3 as broad as segments;

segments 4–7, semiorbiculate, 3–5 × 3–3.5 mm, rounded abaxially, slightly convex adaxially, glabrous or sparsely uncinate-puberulent throughout;

stipe 1–2 mm.

sutures deeply crenate abaxially, sinuate adaxially;

connections adaxial, 1/3 as broad as segments;

segments (1 or)2(–4), semiorbiculate, 4.5–6 × 3–4.5 mm, symmetrically rounded abaxially, nearly straight or convex adaxially, densely uncinate-puberulent throughout;

stipe 1–3 mm.

= 22.