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, branched or unbranched, 50–100 cm, medially uncinate-pubescent, sometimes also ± pilose.

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 persistent, ovate, 8–15 mm, base amplexicaul, pilose-ciliate;

petiole 30–50 mm;

leaflet blades narrowly ovate to ovate, thick, papery, apex acute to rounded, surfaces conspicuously reticulate-veined abaxially, uncinate-puberulent on veins abaxially, sparsely spreading-villous or glabrous adaxially;

terminal blade 35–80 × 30–70 mm, length 1.5–3 times width.

terminal and branched, axillary and unbranched;

rachis uncinate-puberulent;

primary bracts ovate, 1.5–3 mm.

usually unbranched;

rachis patent-pilose and uncinate-puberulent;

primary bracts narrowly ovate, 4–5 mm.

3–19 mm, uncinate-puberulent.

7–15(–23) 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 4–5 mm, uncinate-puberulent and pilose, tube 2–3 mm;

abaxial lobes 2.5 mm, lateral lobes 2 mm;

corolla purplish, 6–8 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 equally crenate;

connections central, 1/2–4/5 as broad as segments;

segments 4–7, elliptic or suborbiculate, 4–7 × 3.5–5 mm, symmetrically convex abaxially and adaxially, densely uncinate-puberulent and villous;

stipe 2–4 mm.

= 22.