Flora of North America species comparison

erect, 50–200 cm, medially uncinate-pubescent and patent-villous.

trifoliolate;

stipules persistent, often patent or reflexed, obliquely ovate and apex acuminate or narrowly ovate and apex aristate, 3–12.5 mm, base amplexicaul;

petiole 8–50 mm;

leaflet blades narrowly ovate to ovate, elliptic, or rhombic, apex obtuse or acute, surfaces obscurely prominently reticulate-veined abaxially, uncinate-puberulent and strigose or subappressed-villous;

terminal blade (20–)40–150 × 10–50 mm, length 2–3 times width.

branched or unbranched;

rachis villous (often with bulbous hairs) and uncinate-puberulent, or only uncinate-puberulent;

primary bracts caducous, narrowly ovate, 4 mm.

10–15 mm.

calyx 1.5–3 mm, uncinate-puberulent, tube to 1 mm;

abaxial lobes 2 mm, lateral lobes 1 mm;

corolla lavender, 4–6 mm.

margins alternately involute and revolute, sutures equally crenate, twisted conspicuously when young;

connections central, 1/4 as broad as segments;

segments (3 or)4–7, orbiculate, broadly elliptic, or rhombic, 3–4.5 × 3–3.5 mm, rounded abaxially and adaxially, densely uncinate-pubescent;

stipe 0.5–1 mm.

= 22.