Flora of North America species comparison

erect, often branched distally, (slightly ribbed), (1–)3–9(–11) dm.

(withered by fruiting; petiole 1–4 cm);

blade elliptic-oblong or oblanceolate, (1–)2–6(–8) cm × (0.3–)5–10 mm, base cuneate, margins entire or obscurely denticulate, apex acute.

sessile or subsessile;

blade (linear or elliptic-linear), margins entire or obscurely denticulate.

of leaves mostly 3- or 4-rayed, 2-rayed ones usually on stem and pedicel.

considerably elongated in fruit.

sepals oblong, 4–7 mm, lateral pair not saccate basally;

petals yellow, obovate, (6–)7–9(–10) × 2–3 mm, claw 5–8 mm, apex rounded;

median filaments 4–6 mm;

anthers oblong, 1.5–2 mm.

suberect or ascending, slender, narrower than fruit, (3–)4–8(–10) mm.

erect, (often appressed to rachis), linear, straight, somewhat torulose, (1–)1.5–2.5(–4) cm × 1–1.3 mm, 4-angled, not striped;

valves with prominent midvein, pubescent outside, trichomes 3- or 4-rayed, fewer 2-rayed ones, usually glabrous inside, rarely sparsely pubescent;

ovules 40–60 per ovary;

style cylindrical, slender, 0.5–2 mm;

stigma capitate, entire.

oblong, 1–1.5 × 0.4–0.6 mm;

not winged.