Flora of North America species comparison

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

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 densely uncinate-puberulent;

primary bracts caducous, broadly deltate, 6 mm.

7–10 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 ± 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.