Flora of North America species comparison

(few to several from base), usually ascending, decumbent, or prostrate, rarely erect, branched distally, 1–4.2(–5) dm, (hirsute proximally).

prostrate, decumbent, ascending, or suberect, branched mainly basally, (0.5–)1.5–8(–10) dm.

not rosulate;

blade margins pinnatifid.

not rosulate;

similar to cauline.

shortly petiolate or sessile;

blade oblong or oblanceolate to obovate, (terminal lobe oblong), (2–)3.5–10(–12) cm × (5–)10–30(–37) mm, (lateral lobe smaller than terminal), base usually auriculate, rarely amplexicaul, margins: proximal pinnatifid or sinuate, distal dentate or entire, (surfaces sparsely pubescent).

petiolate, or (distal) often subsessile;

blade deeply pinnatisect, (lobes 3–6 on each side, sublinear, lanceolate, oblong, elliptic, or ovate), (2–)3.5–15(–20) cm × (7–)10–45(–60) mm, base usually not auriculate, rarely minutely auriculate, margins dentate, serrate, subentire, or (distally) pinnatisect, (lobes 1–3 on each side).

elongated.

elongated.

sepals erect, oblong, 0.8–1.8 × 0.5–1 mm;

petals (erect), yellow, oblanceolate to spatulate, 0.5–1.8 × 0.2–1 mm;

median filaments 0.9–1.3mm;

anthers ovate, 0.3–0.5 mm.

sepals ascending or spreading, oblong, 1.8–3(–3.5) × 0.7–1.5 mm;

petals yellow, spatulate or obovate, (2.2–)2.8–5.5(–6) × 1.5–2.5 mm;

median filaments (1.5–)1.8–3.5(–4) mm;

anthers oblong, 0.7–1 mm.

divaricate-ascending to horizontal, straight or recurved, (1.2–)1.7–5(–8) mm.

divaricate, straight, (3–)4–10(–12) mm.

silicles or siliques, curved, ovoid to pyriform, 2–8(–8.8) × (0.5–)1–2.5 mm;

valves glabrous;

ovules (20–)30–80 per ovary;

style 0.3–1 mm.

siliques, straight, usually linear, rarely oblong-linear, 10–20(–25) × (0.7–)1–1.3(–1.6) mm;

valves glabrous;

ovules 24–80 per ovary;

style 0.5–1(–1.5) mm.

biseriate, brown, cordiform, 0.5–0.7 mm, colliculate.

(rarely produced), usually uniseriate, rarely sub-biseriate, reddish brown, ovoid, 0.5–0.9 mm (0.4–0.5 mm diam.), colliculate.

= 16.

= 32, 40, 48.