Flora of North America species comparison

prostrate, decumbent, or trailing, branched from base, 25–70 cm, uncinate-puberulent to -pubescent.

ascending to erect or sprawling, usually striate, branched, 60–150 cm, sparsely to densely appressed-pilose and sparsely uncinate-pubescent.

usually trifoliolate, rarely unifoliolate proximally;

stipules persistent, reflexed, narrowly deltate, 3–5.5 mm;

petiole 12–20 mm;

leaflet blades pale green abaxially, broadly ovate to suborbiculate, apex obtuse, surfaces clearly reticulate-veined abaxially, prominently reticulate-veined adaxially, loosely strigulose or glabrescent abaxially, appressed, bulbous-pilose adaxially;

terminal blade 20–45 × 15–25 mm, length 1.2–1.7 times width.

trifoliolate;

stipules caducous, narrowly ovate-deltate, 3–4 mm;

petioles 20–40 mm proximally, 8–20 mm distally;

leaflet blades narrowly elliptic-oblong, apex obtuse, lateral veins prominent, reaching margin, margin flat, surfaces subappressed-villous abaxially, glabrescent adaxially;

terminal blade 25–70 × 15–25 mm, length 2–3 times width.

terminal and unbranched;

rachis densely patent uncinate-pubescent and often bulbous-pilose;

primary bracts ovate, 4.5–6.5 mm.

branched or unbranched and elongate when terminal, or unbranched from distal axils;

rachis closely appressed-pubescent and patent uncinate-puberulent;

primary bracts caducous, narrowly ovate, 3–5 mm.

10–15 mm.

8–10 mm.

calyx 5–6 mm, pubescent, tube 1 mm;

abaxial lobes 4–5 mm, lateral lobes 3–4 mm;

corolla pink, lilac to purple, or greenish white, 7–8 mm.

calyx 4 mm, densely uncinate-puberulent, tube 2 mm;

abaxial lobes 2 mm, lateral lobes 1 mm;

corolla purple, 8–11 mm.

sutures crenate abaxially, strongly crenate adaxially;

connections adaxial, 1/3 as broad as segments;

segments (2 or)3–6, elliptic to suborbiculate, 4.5–8 × 3–5 mm, symmetrically rounded abaxially, convex adaxially, densely uncinate-pubescent throughout;

stipe 3–3.5 mm.

sutures crenate;

connections central, 1/3 as broad as segments;

segments 3–8, semiorbiculate, 5–7 × 4–5 mm, rounded abaxially, convex adaxially, villosulous or pubescent and uncinate-puberulent throughout;

stipe 2–5 mm.

= 22.