Flora of North America species comparison

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

ascending to erect, usually striate, usually unbranched, 40–100 cm, usually densely uncinate-puberulent to -pubescent and villous.

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, with 1 unifoliolate proximally, sometimes mostly clustered near base;

stipules persistent, some conspicuously reflexed, narrowly ovate, 4–10 mm;

petiole 15–35 mm;

leaflet blades rhombic or ovate, ± leathery, apex acute or obtuse, surfaces sparsely to densely spreading-villous abaxially, often glaucous, conspicuously reticulate-veined, lateral veins conspicuous, arcuate along margin, sparsely uncinate-puberulent adaxially, more densely so on thick veins;

terminal blade (30–)60–120 × 20–70 mm, length 1.3–2.5 times width.

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

rachis uncinate-puberulent;

primary bracts caducous, ovate, 1–2 mm.

panicles, often relatively large, usually branched;

rachis densely uncinate-pubescent and long-pilose;

primary bracts caducous, narrowly ovate, 2.5–3 mm.

6–12 mm.

3–8 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.

calyx 2.5–3 mm, puberulent to pubescent, tube 1–1.5 mm;

abaxial lobes 1–1.5 mm, lateral lobes 1 mm;

corolla purple, 5–7 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 deeply crenate abaxially, sinuate adaxially;

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

segments 2–5, obtusely rhombic or semiorbiculate, 4–8 × 4–5 mm, obtusely angled abaxially, convex adaxially, uncinate-pubescent throughout;

stipe 1–4 mm.