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 1–4 from base, mostly erect, 5–15(–25) cm, often becoming woody proximally, hirsute-pilose proximally, hairs curved, irregularly spreading or slightly deflexed, sometimes ± antrorse on peduncles and pedicels, 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, 3–8 mm, lobed 1/5–1/3 length, surfaces usually sparsely strigose-hirsute, sometimes glabrate, oxalate deposits absent.

racemes, 6–14-flowered;

peduncles 3–15 cm.

usually umbelliform cymes, sometimes irregular cymes, (1–)2–4(–5)-flowered;

peduncles (3–)5–10(–15) cm.

strigose, hairs short, curved antrorsely.

heterostylous;

sepal apices without tubercles;

petals yellow, 6–12 mm.

tristylous, well above level of leaves;

sepals 3.5–5 mm, apices without tubercles;

petals yellow to orange-yellow, usually with prominent, rarely faint, red lines proximally, very rarely lines absent, 9–15 mm.

ovoid to spheric, 3–5 mm, puberulent.

angular-cylindric, abruptly tapering to apex, 6–16 mm, glabrate to puberulent or sparsely hirsute-strigose, hairs short, sometimes only along angles or at apex.

brown, transverse ridges usually white.