Flora of North America species comparison

usually procumbent, sometimes ascending.

usually procumbent, sometimes ascending.

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

blades obovate to cuneate, 7–13 × 5–10 mm, margins serrate on distal 1/3–2/3.

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

1- or 2(–5)-flowered, racemes, usually 1 pod developing on each peduncle.

2–4 mm;

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

corolla yellow, slightly longer than calyx.

3–4(–6) mm;

calyx glabrous or sparsely hairy, hairs eglandular, lobes equal to tube;

corolla yellow, to 2 times length of 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.

with (2–)3–7 coils, lenticular or discoid, 5–10 × 8–20(–24) mm, coil edges papery at margins, glabrous, glabrescent, sometimes hairs gland-tipped;

coil face with fusing radial veins, often thickened at coil margin.

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

radicle usually slightly less than 1/2 seed length.

9–30, yellow, brownish yellow or reddish brown, triangular, 2.5–3 × 2.5–3 mm.

margins dentate, incised, or lacerate.

margins laciniate.

= 14.

= 16.