Flora of North America species comparison

erect, unbranched or branched distally, (1–)2–7(–10) dm.

petiole 0.1–2(–3) cm;

blade 2- or 3-pinnate, ovate or oblong to obovate in outline, to 15 cm, lateral lobes linear or oblong, (to 10 × 2 mm), margins entire.

sessile or shortly petiolate;

blade smaller distally, distal lobes often narrower, surfaces often glabrous.

usually petiolate, sometimes sessile;

blade base not auriculate, margins usually pinnatisect or dentate, sometimes entire.

stalked, dendritic or forked, sometimes simple, rarely absent.

considerably elongated in fruit.

ebracteate or bracteate, often elongated in fruit.

sepals erect to ascending, yellowish, oblong, 1.8–2.8 mm, glabrate to sparsely pubescent;

petals narrowly oblanceolate, 2–3 × 0.4–0.6 mm;

median filaments 2–3 mm;

anthers 0.3–0.4 mm.

actinomorphic;

sepals erect, ascending, spreading, or reflexed, lateral pair not saccate basally;

petals usually yellow, sometimes white [pink or purple], claw usually present, sometimes absent, often obscure, obsolete, or distinct;

filaments unappendaged, not winged;

pollen 3-colpate.

divaricate to ascending, straight, (5–)8–15(–20) mm.

divaricate-ascending to erect, narrowly linear, torulose, (12–)15–27(–30) × 0.5–0.8(–1) mm, (straight or curved upward);

valves each with distinct midvein;

septum with a broad central longitudinal band appearing as 2 or 3 veins;

ovules 20–48 per ovary;

style obsolete, 0.05–0.2 mm, glabrous.

silicles or siliques, dehiscent, unsegmented, terete or angustiseptate;

ovules 4–100[–numerous] per ovary;

style usually distinct, sometimes obsolete or absent;

stigma entire.

uniseriate, reddish brown, oblong, 0.7–1.3 × 0.3–0.6 mm.

usually biseriate or uniseriate (rarely 4-seriate in Tropidocarpum);

cotyledons usually incumbent, rarely accumbent.

= 28.