Flora of North America species comparison

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

erect or ascending, usually striate, branched, 10–80 cm, pubescent.

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.

trifoliolate;

stipules caducous, narrowly deltate to subulate, 3–4 mm;

petiole 10–40 mm;

leaflet blades narrowly ovate to ovate, apex acute to acuminate, surfaces densely uncinate-puberulent and pilose abaxially, uncinate-puberulent and pilose adaxially;

terminal blade 20–100 × 7–25 mm, length 4–8 or 2–3 times width.

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

rachis uncinate-puberulent;

primary bracts caducous, ovate, 1–2 mm.

branched or unbranched;

rachis uncinate-puberulent;

primary bracts narrowly ovate, 1.4–2.6 mm.

6–12 mm.

5–15 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.

calyx 1–1.5 mm, puberulent, tube 0.5 mm;

abaxial lobes 1–1.5 mm, lateral lobes longer than tube;

corolla pink, drying greenish yellow, 3–4 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.

sutures subequally incised, spirally arranged between young segments when young;

connections adaxial, 1/8 as broad as segments;

segments 2–4, proximal segments subrhombic, 4–6 × 2.5–3.5 mm, irregularly involute, uncinate-pubescent, distal segment semiorbiculate or broadly deltate, much larger than proximal segments, not contorted, 7–10 × 4–5 mm, glabrous, sutures uncinate-puberulent;

stipe 1 mm.