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, usually decumbent to prostrate, less commonly ascending, sporadically rooting at nodes, 10–40 cm, becoming woody proximally, puberulent to hirtellous-puberulent, hairs usually antrorsely curved or crisped, sometimes ± straight, nonseptate, longer hairs 0.2–0.3(–0.8) mm.

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 rudimentary or oblong, margins narrowly flanged, apical auricles absent;

petiole (1–)3–7(–10) cm, hairs nonseptate;

leaflets 3, glaucous and gray-green to yellowish green, obcordate, 5–10(–15) mm, lobed 1/5–1/3 length, surfaces glabrous to loosely strigose, oxalate deposits absent.

racemes, 6–14-flowered;

peduncles 3–15 cm.

umbelliform cymes, 1–2(–3)-flowered;

peduncles 1.5–5 cm.

heterostylous;

sepal apices without tubercles;

petals yellow, 6–12 mm.

semihomostylous, within level of leaves;

sepal apices without tubercles, surfaces strigose to hirsute-strigose;

petals yellow, rarely with red lines proximally, 6–10(–12) mm.

ovoid to spheric, 3–5 mm, puberulent.

angular-cylindric, abruptly tapering to apex, 14–20 mm, strigose-hirsute.

brown to blackish brown, transverse ridges rarely with whitish lines or spots.