Flora of North America species comparison

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

erect or procumbent, usually striate, usually unbranched, sometimes branched, 10–40(–150) cm, uncinate-puberulent and sparsely pubescent or glabrescent.

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, usually unifoliolate proximally and/or distally;

stipules persistent, patent or deflexed, subulate to narrowly ovate-deltate, 1–7 mm;

petiole 10–35 mm;

leaflet blades polymorphic between proximal and/or distal ones and median ones in a single individual, linear, narrowly to broadly ovate, rhombic or transversely ovate, lateral leaflets nearly as large as terminal, apex acute to acuminate or obtuse, surfaces uncinate-puberulent and villous;

terminal blade 25–50 × 6–10 mm, length 0.8–10 times width; unifoliolate blades transversely elliptic or depressed ovate, 10 × 15–20 mm, or ovate or oblong to broadly ovate, 2–4 × 2–3 mm.

usually unbranched;

rachis patent-pilose and uncinate-puberulent;

primary bracts narrowly ovate, 4–5 mm.

branched or unbranched;

rachis densely patent uncinate-puberulent;

primary bracts caducous or persistent, narrowly ovate, 1.5–5.5 mm.

7–15(–23) mm.

6–23 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 2–3 mm, scabrous, often glandular, tube 1 mm;

abaxial lobes 1.5–2 mm, lateral lobes 1.3–1.5 mm;

corolla ephemeral, pinkish or rose-violet, fading yellow-green or blue-green, 2.5–3.5 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, sutures subequally crenate, contorted or appearing spirally twisted when young;

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

segments (1 or)2–5, rhombic, 2–4 × 2–3 mm, angled abaxially, sometimes rounded, obtusely angled adaxially, uncinate-puberulent throughout;

stipe 0.3–3.5 mm.