Flora of North America species comparison

usually procumbent, sometimes ascending.

blades obovate to obcordate, 2–7(–12) × 2–5(–10) mm, margin serrate on distal 1/3.

1- or 2-flowered, usually 1 ripe pod remaining on peduncle, umbels or racemes.

2–4 mm;

calyx pubescent, hairs eglandular, lobes mostly equal to tube;

corolla yellow, slightly longer than calyx.

with 2.5–4(–5) coils, short-cylindrical, 2–4(–5) × 2–3 mm, usually pubescent with eglandular hairs, rarely glabrescent, margin prickly, prickles often relatively thin and flexible, base 2-rooted, 1 root arising in dorsal suture, other in submarginal vein;

faces soft, coil face with very strongly curving radial veins that branch slightly and enter broad lateral vein near dorsal suture.

yellow or brownish yellow, reniform, 1.7–2.4 × 0.9–1.3 mm;

radicle usually slightly less than 1/2 seed length.

margins dentate, incised, or lacerate.

= 14.