Flora of North America species comparison

1–3, decumbent or ascending to erect, ca. 1/2 subterranean, glabrous, clustered on single, short, vertical, deep-seated caudex.

1–3+, ascending to erect, leafless proximally, leafy distally, glabrous or puberulent, from subligneous rhizome.

basal and cauline;

basal: 1–4, palmately compound, ± 2-ternate or 3-ternate, leaflets 3;

stipules adnate to petiole, forming 2 linear-lanceolate wings, unlobed, margins entire, apex of each wing free, acute;

petiole 5–8 cm, glabrous;

blade ovate to deltate, 2.8–6 × 2.6–6.5 cm, ± coriaceous, base tapered, ultimate lobes narrowly elliptic, lanceolate, or oblanceolate, 1–7 mm wide, margins entire, ciliate or eciliate, apex acute, mucronulate, surfaces glabrous;

cauline similar to basal except: stipules usually lanceolate, sometimes broadly ovate, ± leaflike, margins toothed;

petiole 1.3–6 cm;

blade 2–4.8 × 1.2–5.5 cm.

basal and cauline;

basal: 0–4;

stipules ovate to lanceolate, margins entire, coarsely toothed, or crenate, apex acute or obtuse;

petiole 2.7–19.6 cm, lanceolate, margins ciliate or eciliate, auricles 0.1–0.5 mm;

petals lemon-yellow on both surfaces, lower 3 brownish purple-veined, lateral 2 and sometimes others, bearded, lowest 8–18 mm, spur yellow to greenish, gibbous, 1–2.5 mm;

style head bearded; cleistogamous flowers axillary.

2.5–11 cm, glabrous.

sepals lanceolate to ovate, margins ciliate, auricles 0.5–1 mm;

petals: upper 2 almost black abaxially, dark reddish violet adaxially, lower 3 pale yellow, cream, or ± white, lateral 2 bearded, with deep yellow to orange patch basally, dark reddish violet-veined, lowest with deep yellow to orange patch basally, dark reddish violet-veined, 5–18 mm, spur yellow, gibbous, 0.5–2 mm;

style head bearded; cleistogamous flowers absent.

ellipsoid, 4–12 mm, glabrous.

ellipsoid, 8–12(–20) mm, glabrous or tomentose.

light brown, shiny, 3.2–3.5 mm.

brown, 1.8–3 mm.

= 60, 72.

= 12.