Flora of North America species comparison

1–5 from base, erect, 0.5–7 cm, usually herbaceous, sometimes becoming ± woody proximally, hirtellous to villous-hirtellous.

usually 2–8 from base, erect initially, usually becoming decumbent, 5–20(–40) cm, becoming woody proximally, hirsute-pilose on at least proximal 2/3, hairs curved, loosely and irregularly spreading, nonseptate.

cauline;

stipules rudimentary;

petiole 1.5–6 cm;

leaflets 3, green, obcordate, 5–12 mm, lobed 1/5 length, lobes apically convex, surfaces glabrous, oxalate deposits absent.

basal and cauline;

stipules oblong, margins narrowly flanged or without free portions, apical auricles absent;

petiole 2–7 cm;

leaflets 3, green, obcordate, 3.5–12 mm, lobed 1/5–1/3 length, surfaces usually strigose-hirsute, sometimes glabrate, oxalate deposits absent.

racemes, 6–14-flowered;

peduncles 3–15 cm.

umbelliform cymes, less commonly irregular cymes, (1–)3–8-flowered;

peduncles (3–)5–10(–15) cm.

villous, hairs long, spreading.

heterostylous;

sepal apices without tubercles;

petals yellow, 6–12 mm.

distylous, well above level of leaves;

sepal apices without tubercles;

petals yellow to yellow-orange, with prominent red lines proximally, (13–)15–20(–23) mm.

ovoid to spheric, 3–5 mm, puberulent.

angular-cylindric, abruptly tapering to apex, 10–15 mm, sparsely to densely hirsute-pilose, hairs long, sometimes mostly along angles.

brown, transverse ridges usually white.