Flora of North America species comparison

erect, often branched distally, (ribbed), (0.7–)1.5–10(–15) dm.

(withered by fruiting), similar to cauline.

(median and distal) shortly petiolate or sessile;

blade (lanceolate, linear, or elliptic-oblong, (1–)2–7(–11) cm × (2–)5–12(–23) mm, base cuneate) margins usually subentire or denticulate, rarely sinuate-dentate, (apex acute or obtuse).

considerably elongated in fruit.

sepals oblong, 1.8–3.2 mm, lateral pair not saccate basally;

petals yellow, narrowly spatulate, 3–5.5 × 1.5–2 mm, claw 1.5–3.5 mm, apex rounded;

median filaments 2–3.5 mm;

anthers oblong, 0.5–0.7 mm.

divaricate or ascending, slender, much narrower than fruit, 5–13(–16) mm.

suberect or divaricate-ascending, 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 3–5-rayed, densely pubescent inside;

ovules (20–)30–55 per ovary;

style cylindrical, slender, 0.5–1.5 mm;

stigma entire or slightly 2-lobed, lobes as long as wide.

oblong, 1–1.5 × 0.4–0.6 mm;

not winged.

of leaves primarily 3- or 4-rayed, sometimes mixed with 5-rayed ones, 2-rayed trichomes primarily on stem and pedicels.

= 16.