Flora of North America species comparison

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

ascending to erect or sprawling, usually striate, branched, 60–150 cm, sparsely to densely appressed-pilose and sparsely uncinate-pubescent.

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.

trifoliolate;

stipules caducous, narrowly ovate-deltate, 3–4 mm;

petioles 20–40 mm proximally, 8–20 mm distally;

leaflet blades narrowly elliptic-oblong, apex obtuse, lateral veins prominent, reaching margin, margin flat, surfaces subappressed-villous abaxially, glabrescent adaxially;

terminal blade 25–70 × 15–25 mm, length 2–3 times width.

branched or unbranched;

rachis uncinate-puberulent;

primary bracts narrowly ovate, 1.4–2.6 mm.

branched or unbranched and elongate when terminal, or unbranched from distal axils;

rachis closely appressed-pubescent and patent uncinate-puberulent;

primary bracts caducous, narrowly ovate, 3–5 mm.

5–15 mm.

8–10 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.

calyx 4 mm, densely uncinate-puberulent, tube 2 mm;

abaxial lobes 2 mm, lateral lobes 1 mm;

corolla purple, 8–11 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.

sutures crenate;

connections central, 1/3 as broad as segments;

segments 3–8, semiorbiculate, 5–7 × 4–5 mm, rounded abaxially, convex adaxially, villosulous or pubescent and uncinate-puberulent throughout;

stipe 2–5 mm.