Flora of North America species comparison

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

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

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.

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.

terminal and branched, axillary and unbranched;

rachis uncinate-puberulent;

primary bracts ovate, 1.5–3 mm.

terminal and branched;

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

primary bracts ovate, 2.5–3 mm.

3–19 mm, uncinate-puberulent.

2–5 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.

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 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.

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.

= 22.