Flora of North America species comparison

1(–3) from base, mostly erect, 10–25 cm, herbaceous, sparsely to moderately villous, hairs nonseptate and usually septate.

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 (2–)3–5(–6) cm, hairs septate and nonseptate;

leaflets 3, green, obcordate, (8–)10–16(–20) mm, lobed 1/5–1/3 length, margins green, surfaces glabrous to sparsely strigose, 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.

umbelliform cymes, 1–3-flowered;

peduncles (2–)4–8(–10) cm.

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

peduncles (3–)5–10(–15) cm.

villous, hairs long, spreading.

tristylous, above level of leaves;

sepal apices without tubercles;

petals yellow, 12–20 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.

oblong-cylindric, 10–15 mm, densely 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.

= 24.