Flora of North America species comparison

erect or ascending, usually striate, 50–150 cm, usually glabrous, sometimes sparsely uncinate-pubescent or pilose.

ascending to erect, usually striate, usually unbranched, 40–100 cm, usually densely uncinate-puberulent to -pubescent and villous.

trifoliolate;

stipules usually persistent, narrowly ovate or subulate, 10–20 mm;

petiole 40–70 mm;

leaflet blades ovate to broadly ovate, apex sharply acuminate to shortly cuspidate, surfaces glabrous (except veins spreading-villosulous);

terminal blade 50–120 × 30–70 mm, length 1.5–3 times width.

trifoliolate, with 1 unifoliolate proximally, sometimes mostly clustered near base;

stipules persistent, some conspicuously reflexed, narrowly ovate, 4–10 mm;

petiole 15–35 mm;

leaflet blades rhombic or ovate, ± leathery, apex acute or obtuse, surfaces sparsely to densely spreading-villous abaxially, often glaucous, conspicuously reticulate-veined, lateral veins conspicuous, arcuate along margin, sparsely uncinate-puberulent adaxially, more densely so on thick veins;

terminal blade (30–)60–120 × 20–70 mm, length 1.3–2.5 times width.

branched;

rachis densely uncinate-pubescent to rarely glabrescent;

primary bracts conspicuously covering apex of inflorescences, narrowly ovate, 8–14 mm.

panicles, often relatively large, usually branched;

rachis densely uncinate-pubescent and long-pilose;

primary bracts caducous, narrowly ovate, 2.5–3 mm.

4–8 mm, densely patent uncinate-puberulent and sparsely pilose.

3–8 mm.

calyx 3–4 mm, glabrate, margins sparsely ciliate, lobes pilose, tube 1.5–2 mm;

abaxial lobes 3–4 mm, lateral lobes 2–3 mm;

corolla purple, 8–12 mm.

calyx 2.5–3 mm, puberulent to pubescent, tube 1–1.5 mm;

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

corolla purple, 5–7 mm.

sutures dentate abaxially, sinuate adaxially;

connections adaxial, 1/2 as broad as segments;

segments (1–)4–7, obliquely narrow-rhombic or suborbiculate, (7–)9–11 × 4–5 mm, angled abaxially, slightly convex adaxially, sparsely uncinate-puberulent, sutures densely uncinate-puberulent;

stipe 1–2.5 mm.

sutures deeply crenate abaxially, sinuate adaxially;

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

segments 2–5, obtusely rhombic or semiorbiculate, 4–8 × 4–5 mm, obtusely angled abaxially, convex adaxially, uncinate-pubescent throughout;

stipe 1–4 mm.