Flora of North America species comparison

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

decumbent or prostrate, 50–100 cm, patent-villous and uncinate-puberulent.

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.

usually trifoliolate, rarely unifoliolate;

stipules persistent, reflexed in age, deltate or ovate, 5–12 mm, base obliquely cordate, subamplexicaul;

petiole 10–35 mm;

leaflet blades ovate, ± leathery, apex obtuse or sometimes acute, surfaces prominently reticulate-veined adaxially, uncinate-puberulent on veins or glabrescent abaxially, uncinate-puberulent adaxially;

terminal blade 30–75 × 22–53 mm, length 1.2–2 times width.

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

rachis uncinate-puberulent;

primary bracts caducous, ovate, 3–4 mm.

ascending to erect, axillary distally and unbranched, sometimes also terminal and branched;

rachis pilose and uncinate-puberulent;

primary bracts caducous, broadly ovate, 5–6 mm.

7–9 mm.

10–20 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 3–4 mm, pilose and uncinate-puberulent, tube 1 mm;

abaxial lobes 3 mm, lateral lobes 1.2–1.5 mm, to 2.5 mm in fruit;

corolla white or ochroleucous, 7–8 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.

sutures deeply crenate abaxially, crenate adaxially, contorted by irregular folding of margins near or at connection between segments;

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

segments 3–5, suborbiculate to subrhombic, 7–10 × 5–8 mm, symmetrically rounded abaxially, convex adaxially, glabrous, sutures uncinate-pubescent;

stipe 0 mm (or indistinctly stipitate by narrowing proximal segment).