Flora of North America species comparison

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

prostrate, lineate, to 100 cm, uncinate-puberulent and -pubescent, also sparsely to moderately pilose.

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 mostly persistent, inconspicuous, narrowly ovate, 2–5 mm;

petiole 5–21 mm;

leaflet blades orbiculate or broadly rhombic-ovate, apex rounded, surfaces glabrous or inconspicuously spreading-villous abaxially, glabrous adaxially;

terminal blade 15–30 × 10–30 mm, length 1–1.2 times width.

unbranched;

rachis densely patent uncinate-pubescent;

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

densely flowered, ascending, usually terminal and branched, axillary and unbranched;

rachis uncinate-puberulent;

primary bracts caducous, ovate, 1–2 mm.

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

6–12 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 2 mm, puberulent and ± pilose, tube 1 mm;

abaxial lobes 1.5 mm, lateral lobes 1 mm;

corolla usually purple, rarely white, 3.5–5 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 deeply crenate abaxially, sinuate adaxially;

connections adaxial, 1/3 as broad as segments;

segments 2–4, ovate-orbiculate or obovate, 3.5–6 × 2.5–4 mm, symmetrically rounded abaxially, convex adaxially, uncinate-pubescent and pilose throughout;

stipe 1–2.5 mm.

= 22.