Flora of North America species comparison

ascending to erect, 30–100 cm, medially villous, uncinate-puberulent and -pubescent, scarcely pilose.

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

trifoliolate;

stipules persistent, narrowly ovate or ovate, 3–6.5 mm;

petiole 5–30 mm;

leaflet blades ovate to narrowly ovate, base usually rounded, apex obtuse or acute, surfaces closely spreading-villous (often velvety) abaxially, slightly uncinate-puberulent on veins adaxially;

terminal blade 50–100 × 30–56 mm, length 1.5–2(–2.2) 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.

terminal and branched;

rachis patent uncinate-puberulent and pilose;

primary bracts ovate, 2–4 mm, usually villous.

branched or unbranched;

rachis densely patent uncinate-puberulent;

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

4–10 mm.

6–23 mm.

calyx 2–3 mm, puberulent and sparsely pilose, tube 1 mm;

abaxial lobes 1.5–2 mm, lateral lobes 1 mm;

corolla purple or pink, 6–7 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 deeply crenate abaxially, sinuate adaxially;

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

segments 2–4, semiorbiculate, 4–7 × 3–4.5 mm, rounded abaxially, convex adaxially, often somewhat angled when young, uncinate-pubescent throughout;

stipe 3–4 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.