Flora of North America species comparison

stiffly erect or ascending, branched at base and appearing clustered, 40–80 cm, glabrescent or sparsely uncinate-puberulent.

erect, ascending, or procumbent, usually striate, 30–60(–100) cm, sparsely to densely pilose and uncinate-pubescent.

unifoliolate;

stipules caducous, narrowly ovate, 3–9 mm;

petiole 10–30 mm;

leaflet blades linear, (40–)70–130 × 2–5 mm, length 10+ times width, apex acute or acuminate, surfaces uncinate-puberulent and sparsely strigose on veins abaxially, uncinate-puberulent adaxially.

trifoliolate, sometimes unifoliolate proximally;

stipules persistent, recurved, subulate, 2–3 mm;

petiole 7–25 mm;

leaflet blades usually oblong-ovate to narrowly so, sometimes broadly elliptic to oblong, apex obtuse or acute, surfaces sparsely uncinate-puberulent;

terminal blade 10–30(–35) × 8–10 mm, length 1–3.5 times width.

branched or unbranched;

rachis sparsely uncinate-puberulent;

primary bracts ovate, 2–3 mm.

usually unbranched, sometimes branched;

rachis patent uncinate-puberulent;

primary bracts narrowly ovate, 2.5–3 mm.

10–20 mm, uncinate-puberulent or glabrescent.

8–15 mm.

calyx 2 mm, puberulent and uncinate-puberulent, tube 0.8 mm;

abaxial lobes 1.2 mm, lateral lobes 1 mm;

corolla ephemeral, purple, 3 mm.

calyx 1.5–2.5 mm, pubescent, tube 1 mm;

abaxial lobes 1.5 mm, lateral lobes 1 mm;

corolla pink-purple, 4–5 mm.

margins slightly involute, sutures equally crenate;

connections central, 1/4 as broad as segments;

segments 3–6, broadly elliptic, (2–)3–3.5 × 2.5–3 mm, convex or rounded abaxially and adaxially, sparsely uncinate-puberulent, sutures moderately uncinate-puberulent;

stipe to 1 mm.

sutures subequally crenate;

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

segments 2–7, rounded or broadly elliptic, 2.5–3 × 2.5 mm, abaxially and adaxially rounded, glabrous or slightly puberulent;

stipe 1–2 mm.