Flora of North America species comparison

prostrate, 100–200(–300) cm, sparsely to densely patent-pubescent and uncinate-puberulent.

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

trifoliolate;

stipules often caducous, sometimes persistent, ovate or narrowly ovate, 4.5–8 mm;

petiole 28–50 mm;

leaflet blades ovate or rhombic-ovate, lateral veins inconspicuous, arcuate along margin, apex acute or obtuse, surfaces sparsely strigose;

terminal blade 30–70 × 20–50 mm, length 1.4–2 times width.

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.

lax-flowered, ascending, terminal and branched, also axillary and unbranched;

rachis uncinate-puberulent;

primary bracts caducous, ovate, 3–4 mm.

branched or unbranched;

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

primary bracts caducous, narrowly ovate, 4 mm.

7–9 mm.

10–15 mm.

calyx 2.5–3.5 mm, uncinate-puberulent, tube 1 mm;

abaxial lobes 2 mm, lateral lobes 1.5 mm;

corolla purple, 8–9.5 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.

sutures obtusely dentate abaxially, sinuate adaxially;

connections adaxial, 1/4–1/3 as broad as segments;

segments 3 or 4, deltate-rhombic, 6–8 × 4–5 mm, obtusely angled abaxially, straight or slightly convex adaxially, uncinate-pubescent;

stipe 2 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.