Flora of North America species comparison

ascending or erect, usually striate, angled, 30–100 cm, densely uncinate-puberulent to -pubescent and sparsely glutinous-pilose.

erect or ascending, usually striate, 30–100(–150) cm, glabrous or sparsely to densely uncinate-puberulent or conspicuously pilose or glabrescent.

trifoliolate;

stipules persistent, ovate, 7.5–14.5 mm;

petiole 40–90 mm;

leaflet blades narrowly ovate to ovate or broadly ovate, thick, leathery, apex acute, usually pale-blotched along midrib adaxially, surfaces uncinate-puberulent to -pubescent and villous;

terminal blade 40–120 × 20–66 mm, length 2 times width.

trifoliolate;

stipules caducous, subulate to narrowly ovate-deltate, 2–6 mm;

petiole (10–)20–50 mm;

leaflet blades polymorphic, linear, narrowly ovate, narrowly ovate-oblong, ovate, broadly ovate to subrounded, or rhombic, usually thin, rarely thick, papery, apex acute to obtuse, surfaces closely to subdensely appressed pilose, inconspicuously reticulate-veined abaxially, sparsely appressed-puberulent and pilose adaxially;

terminal blade 20–100 × 8–65 mm, length 1–8 times width.

branched or unbranched;

rachis densely uncinate-puberulent to -pubescent and glutinous-villous;

primary bracts ovate to broadly ovate, 7–10 mm.

terminal panicles and axillary racemes, branched, very diffuse;

rachis moderately to densely uncinate-puberulent to -pubescent;

primary bracts narrowly ovate, 1–3.5 mm.

8–25 mm, patent uncinate-pubescent and pilose.

(3–)6–12(–20) mm.

calyx 3–5 mm, puberulent and pubescent, ± glutinous, tube 1.2–1.5 mm;

abaxial lobes 2.5–4 mm, lateral lobes 1.5 mm;

corolla white, 7–8 mm.

calyx 2–3 mm, pubescent, tube 1–1.5 mm;

abaxial lobes 2 mm, lateral lobes 1 mm;

corolla lilac to purple, 6–9 mm.

sutures nearly equally crenate;

connections adaxial, 1/4 as broad as segments;

segments (2 or)3–5(or 6), subrhombic, 6–8 × 4 mm, obtusely angled abaxially, somewhat angled adaxially, densely uncinate-pubescent throughout;

stipe 2–4 mm.

sutures deeply crenate or dentate abaxially, sinuate adaxially;

connections adaxial, 1/5–1/3 as broad as segments;

segments (2 or)3–5, deltate to rhombic, (4–)5–10 × 3–5 mm, angled abaxially (sometimes obtusely), convex adaxially, uncinate-puberulent to -pubescent;

stipe 1–7 mm.

= 22.