Flora of North America species comparison

erect, ascending, or procumbent, usually striate, 30–60(–100) cm, sparsely to densely pilose and uncinate-pubescent.

prostrate, 100–200(–300) cm, sparsely to densely patent-pubescent and uncinate-puberulent.

trifoliolate, sometimes unifoliolate proximally;

stipules persistent, recurved, subulate, 2–3 mm;

petiole 7–25 mm;

leaflet blades usually oblong-ovate to narrowly so, sometimes broadly elliptic to oblong, apex obtuse or acute, surfaces sparsely uncinate-puberulent;

terminal blade 10–30(–35) × 8–10 mm, length 1–3.5 times width.

trifoliolate;

stipules often caducous, sometimes persistent, ovate or narrowly ovate, 4.5–8 mm;

petiole 28–50 mm;

leaflet blades ovate or rhombic-ovate, lateral veins inconspicuous, arcuate along margin, apex acute or obtuse, surfaces sparsely strigose;

terminal blade 30–70 × 20–50 mm, length 1.4–2 times width.

usually unbranched, sometimes branched;

rachis patent uncinate-puberulent;

primary bracts narrowly ovate, 2.5–3 mm.

lax-flowered, ascending, terminal and branched, also axillary and unbranched;

rachis uncinate-puberulent;

primary bracts caducous, ovate, 3–4 mm.

8–15 mm.

7–9 mm.

calyx 1.5–2.5 mm, pubescent, tube 1 mm;

abaxial lobes 1.5 mm, lateral lobes 1 mm;

corolla pink-purple, 4–5 mm.

calyx 2.5–3.5 mm, uncinate-puberulent, tube 1 mm;

abaxial lobes 2 mm, lateral lobes 1.5 mm;

corolla purple, 8–9.5 mm.

sutures subequally crenate;

connections central, 1/5–1/4 as broad as segments;

segments 2–7, rounded or broadly elliptic, 2.5–3 × 2.5 mm, abaxially and adaxially rounded, glabrous or slightly puberulent;

stipe 1–2 mm.

sutures obtusely dentate abaxially, sinuate adaxially;

connections adaxial, 1/4–1/3 as broad as segments;

segments 3 or 4, deltate-rhombic, 6–8 × 4–5 mm, obtusely angled abaxially, straight or slightly convex adaxially, uncinate-pubescent;

stipe 2 mm.