Flora of North America species comparison

ascending to erect, branched or unbranched, 50–100 cm, medially uncinate-pubescent, sometimes also ± pilose.

erect, branched, angled and grooved, 40–60 cm, uncinate-puberulent and -pubescent, also sparsely pilose.

trifoliolate;

stipules persistent, ovate, 8–15 mm, base amplexicaul, pilose-ciliate;

petiole 30–50 mm;

leaflet blades narrowly ovate to ovate, thick, papery, apex acute to rounded, surfaces conspicuously reticulate-veined abaxially, uncinate-puberulent on veins abaxially, sparsely spreading-villous or glabrous adaxially;

terminal blade 35–80 × 30–70 mm, length 1.5–3 times width.

trifoliolate;

stipules ± persistent, reflexed, broadly or obliquely ovate, 7–8 mm, base subamplexicaul;

petiole 10–50 mm;

leaflet blades usually ovate, rhombic to broadly ovate, or semiorbiculate, rarely narrowly ovate, base truncate or broadly obtuse, apex acute, surfaces densely villosulous abaxially, uncinate-puberulent and pilose adaxially;

terminal blade 50–100 × 40–75 mm, length usually less than 2 times width.

usually unbranched;

rachis patent-pilose and uncinate-puberulent;

primary bracts narrowly ovate, 4–5 mm.

usually unbranched;

rachis densely patent uncinate-pubescent;

primary bracts broadly ovate, 4.5–7 mm.

7–15(–23) mm.

5 mm.

calyx 4–5 mm, uncinate-puberulent and pilose, tube 2–3 mm;

abaxial lobes 2.5 mm, lateral lobes 2 mm;

corolla purplish, 6–8 mm.

calyx 2–2.5 mm, uncinate-puberulent, tube 1 mm;

abaxial lobes 1–1.5 mm, lateral lobes 0.7 mm;

corolla blue-green, 6–7 mm.

sutures equally crenate;

connections central, 1/2–4/5 as broad as segments;

segments 4–7, elliptic or suborbiculate, 4–7 × 3.5–5 mm, symmetrically convex abaxially and adaxially, densely uncinate-puberulent and villous;

stipe 2–4 mm.

margins ± involute and contorted, sutures deeply crenate abaxially, shallowly dentate adaxially;

connections central, 1/5 as broad as segments;

segments (1–)3–5, subrhombic to semiovate, 7–15 × 5–8 mm, rounded abaxially, obtusely angled adaxially, glabrous, sutures densely uncinate-pubescent;

stipe 2–3.5 mm.