Flora of North America species comparison

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

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

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.

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 densely patent uncinate-pubescent;

primary bracts broadly ovate, 4.5–7 mm.

branched or unbranched;

rachis densely patent uncinate-puberulent;

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

5 mm.

6–23 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.

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.

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.

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.