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 or ascending, usually striate, angled, 30–90 cm, densely uncinate-puberulent.

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;

stipules caducous, linear-lanceolate, 1–4 mm;

petiole 3–13 mm;

leaflet blades somewhat paler abaxially, narrowly ovate-oblong, lateral slightly smaller than terminal, apex acute, lateral veins looped within margin, margins revolute, surfaces strigulose;

terminal blade 30–80 × 6–20 mm, length 3–5 times width.

branched or unbranched;

rachis sparsely uncinate-puberulent;

primary bracts ovate, 2–3 mm.

branched or unbranched;

rachis densely uncinate-puberulent;

primary bracts caducous, broadly deltate, 6 mm.

10–20 mm, uncinate-puberulent or glabrescent.

7–10 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 4 mm, glabrous, tube 1.5–2 mm;

abaxial lobes 2 mm, lateral lobes 1.5–2 mm;

corolla purple, 10–12 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 ± deeply crenate abaxially, crenate adaxially;

connections slightly adaxial, 1/2 as broad as segments, sometimes contorted (twisted);

segments 2–5, elliptic, 5–6 × 3 mm, rounded abaxially, slightly rounded adaxially, uncinate-pubescent throughout;

stipe 1–2 mm.