Flora of North America species comparison

stiffly erect or ascending, branched at base and appearing clustered, 40–80 cm, glabrescent or sparsely uncinate-puberulent.

erect or ascending, branched, 50–200 cm, conspicuously or sparsely villous and uncinate-pubescent.

unifoliolate;

stipules caducous, narrowly ovate, 3–9 mm;

petiole 10–30 mm;

leaflet blades linear, (40–)70–130 × 2–5 mm, length 10+ times width, apex acute or acuminate, surfaces uncinate-puberulent and sparsely strigose on veins abaxially, uncinate-puberulent adaxially.

trifoliolate;

stipules mostly persistent, usually reflexed, broadly or narrowly ovate, 5–13 mm, base oblique, often auriculate, subamplexicaul;

petiole 30–60 mm;

leaflet blades ovate, thick, papery, apex acute to gradually acuminate, surfaces densely uncinate-puberulent abaxially, uncinate-puberulent and pubescent on veins adaxially;

terminal blade 50–130 × 30–100 mm, length 1.5–2 times width.

branched or unbranched;

rachis sparsely uncinate-puberulent;

primary bracts ovate, 2–3 mm.

paniclelike, branched;

rachis densely patent bulbous-villous and uncinate-puberulent;

primary bracts caducous, narrowly ovate, 4–6 mm.

10–20 mm, uncinate-puberulent or glabrescent.

persistent, 8–13 mm.

calyx 2 mm, puberulent and uncinate-puberulent, tube 0.8 mm;

abaxial lobes 1.2 mm, lateral lobes 1 mm;

corolla ephemeral, purple, 3 mm.

calyx 3–5 mm, sparsely or densely puberulent, tube 1 mm;

abaxial lobes to 3 mm, lateral lobes 1 mm;

corolla usually purple to pinkish, rarely white, 9–13 mm.

margins slightly involute, sutures equally crenate;

connections central, 1/4 as broad as segments;

segments 3–6, broadly elliptic, (2–)3–3.5 × 2.5–3 mm, convex or rounded abaxially and adaxially, sparsely uncinate-puberulent, sutures moderately uncinate-puberulent;

stipe to 1 mm.

sutures dentate or crenate abaxially, sinuate adaxially;

connections adaxial, 1/3–1/2 as broad as segments;

segments 4–6, broadly elliptic, 6.5–13 × 4–7 mm, obtusely angled abaxially becoming round, convex adaxially, uncinate-puberulent and villous, hairs particularly dense on sutures and between segments;

stipe 2.5–6 mm.

= 22.