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.

erect or ascending, usually striate, sparsely branched, 20–80 cm, 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 caducous, narrowly ovate, 6–8 mm;

petiole 1–5 mm;

leaflet blades narrowly oblong-elliptic to linear, apex acute, surfaces villosulous;

terminal blade 40–60 × 4–10 mm, length 3.5–10 times width.

terminal and branched, axillary and unbranched;

rachis uncinate-puberulent;

primary bracts ovate, 1.5–3 mm.

usually unbranched;

rachis uncinate-puberulent;

primary bracts caducous, broadly ovate, 4.5–5.5 mm.

3–19 mm, uncinate-puberulent.

8–15 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 3 mm, uncinate-puberulent, lobes pubescent, tube 1.2 mm;

abaxial lobes 2 mm, lateral lobes 1.5 mm;

corolla blue-purple, 5–6 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 undulate abaxially, crenate adaxially;

connections adaxial, 1/3 as broad as segments;

segments (2 or)3–5, semiorbiculate, 4–5(–6) × 4 mm, rounded abaxially, convex adaxially, uncinate-puberulent;

stipe 1–2 mm.

= 22.

= 22.