Flora of North America species comparison

erect, branched, angled and grooved, 40–60 cm, uncinate-puberulent and -pubescent, also sparsely pilose.

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

trifoliolate;

stipules ± persistent, reflexed, broadly or obliquely ovate, 7–8 mm, base subamplexicaul;

petiole 10–50 mm;

leaflet blades usually ovate, rhombic to broadly ovate, or semiorbiculate, rarely narrowly ovate, base truncate or broadly obtuse, apex acute, surfaces densely villosulous abaxially, uncinate-puberulent and pilose adaxially;

terminal blade 50–100 × 40–75 mm, length usually less than 2 times width.

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.

usually unbranched;

rachis densely patent uncinate-pubescent;

primary bracts broadly ovate, 4.5–7 mm.

branched or unbranched;

rachis densely uncinate-puberulent;

primary bracts caducous, broadly deltate, 6 mm.

5 mm.

7–10 mm.

calyx 2–2.5 mm, uncinate-puberulent, tube 1 mm;

abaxial lobes 1–1.5 mm, lateral lobes 0.7 mm;

corolla blue-green, 6–7 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 ± involute and contorted, sutures deeply crenate abaxially, shallowly dentate adaxially;

connections central, 1/5 as broad as segments;

segments (1–)3–5, subrhombic to semiovate, 7–15 × 5–8 mm, rounded abaxially, obtusely angled adaxially, glabrous, sutures densely uncinate-pubescent;

stipe 2–3.5 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.