Flora of North America species comparison

prostrate, densely branched, 20–80 cm, ascending-pilose or strigose.

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

trifoliolate;

stipules persistent, narrowly ovate, 3–5 mm;

petiole 3–7.5 mm;

leaflet blades broadly obovate or cuneate-obovate, often folding downwards, apex emarginate, surfaces usually sparsely uncinate-puberulent or subappressed-pilose along midrib abaxially, rarely entire surface, glabrous adaxially;

terminal blade 5–10 × 3–11 mm, length 0.8–1.2 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.

terminal fascicles opposite distal leaf, appearing axillary, unbranched;

rachis pubescent;

primary bracts narrowly ovate, 4 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.

8–12 mm.

8–10 mm.

calyx 2.5–3 mm, appressed-pubescent, tube 1.2 mm;

abaxial lobes 1.5–1.7 mm, lateral lobes 1.5–1.7 mm, adaxial lobes deeply 2-toothed;

corolla pale pink to purplish, 4–5 mm, keel distinctly longer than wings.

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

abaxial lobes 2 mm, lateral lobes 1 mm;

corolla purple, 8–11 mm.

sutures weakly crenate abaxially, with broad connection between segments, barely sinuate adaxially;

connections 2/3–4/5 as broad as segments;

segments 3–5, nearly square, 2.5–3.5 × 2.5–3 mm, symmetrically convex abaxially, slightly concave adaxially, inconspicuously uncinate-pubescent or glabrescent;

stipe 0 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.

= 22.