Flora of North America species comparison

erect, unbranched or branched distally, 1.5–7 dm.

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

blade linear to linear-oblanceolate, 1.5–6(–8) cm × 2–8 mm, base attenuate, margins entire or dentate, apex acute.

(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.

(distal) sessile;

blade margins entire or denticulate.

sessile or subsessile;

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

elongated or not in fruit.

considerably elongated in fruit.

sepals oblong to linear-oblong, 4–6 mm, lateral pair slightly saccate basally;

petals yellow, oblanceolate, 6–9(–11) × 1–2 mm, claw 5–7 mm, apex rounded;

median filaments 5–7 mm;

anthers narrowly oblong to linear, 1–2 mm.

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.

divaricate-ascending to ascending, stout, slightly narrower than fruit, 4–9(–15) mm.

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

ascending to divaricate-ascending, (not appressed to rachis), narrowly linear, straight, not torulose, 3–5.8(–7) cm × 1–1.5(–1.8) mm, slightly 4-angled or terete, not striped;

valves with somewhat prominent midvein, pubescent outside, trichomes 2–4-rayed, glabrous inside;

ovules 36–66 per ovary;

style cylindrical, stout, 0.7–3 mm, moderately to sparsely pubescent;

stigma strongly 2-lobed, lobes as long as wide.

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.

ovoid, 1.2–1.7 × 0.8–1 mm;

not winged or wing apiculate.

oblong, 1–1.5 × 0.4–0.6 mm;

not winged.

of leaves 2- or 3-rayed.

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

= 81.