Flora of North America species comparison

erect or ascending, to 300 cm, pubescent or glabrescent.

erect or ascending, usually striate, sparsely branched, 20–80 cm, pubescent.

trifoliolate;

stipules usually persistent, narrowly ovate-deltate, 5–10 mm;

petiole usually 15–20 mm;

leaflet blades elliptic to ovate, apex obtuse or acute, surfaces finely spreading-villosulous to substrigose abaxially, uncinate-puberulent or glabrescent adaxially;

terminal blade 20–90 × 15–45 mm, length 1.5–4 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.

unbranched;

rachis densely patent uncinate-pubescent;

primary bracts caducous, narrowly ovate, 6–7 mm.

usually unbranched;

rachis uncinate-puberulent;

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

persistent with calyx-remnant at top after loments drop, 5–9 mm.

8–15 mm.

calyx 2–3.5 mm, uncinate-puberulent, lobes pilose, tube 1 mm;

abaxial lobes 1.5–2.5 mm, lateral lobes 1–2 mm;

corolla purple, 5–8 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 symmetrically crenate abaxially, straight or slightly sinuate adaxially;

connections central, 1/2–2/3 as broad as segments;

segments 4–8, semiobovate, 3.5–5 × 2.5–3 mm, broadly rounded abaxially, straight or barely convex adaxially, uncinate-puberulent;

stipe 1.5–2 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.