Flora of North America species comparison

(usually several from base, rarely simple), usually ascending, decumbent, or prostrate, rarely erect, unbranched or branched [basally] distally, (slender).

basal and cauline;

petiolate or sessile;

basal (withered by fruiting), not rosulate, petiolate, blade margins pinnatifid or pinnatisect;

cauline sessile or subsessile, blade margins pinnatifid.

usually petiolate, sometimes sessile;

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

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

(several-flowered, bracteate throughout), considerably elongated in fruit.

ebracteate or bracteate, often elongated in fruit.

sepals erect to ascending, oblong, (glabrous or pubescent);

petals yellow, sometimes with purple tinge, oblanceolate, obovate, or spatulate, (slightly longer than sepals), claw undifferentiated from blade;

stamens slightly tetradynamous;

filaments sometimes slightly dilated basally;

anthers ovate, (apex obtuse);

nectar glands confluent, subtending bases of stamens.

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.

erect, ascending, or divaricate, slender.

siliques or silicles, sessile, linear, oblong, or obdeltoid, smooth, strongly angustiseptate;

valves [(2 or) 4 in T. capparideum, keeled], not veined, (thin-leathery throughout, or distally subwoody or thick-leathery and tuberculate-rugose), pubescent;

replum rounded;

septum complete or absent;

ovules 4–70 per ovary;

style distinct, (slender);

stigma capitate.

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

ovules 4–100[–numerous] per ovary;

style usually distinct, sometimes obsolete or absent;

stigma entire.

uniseriate or (in 4-valved fruits) 4-seriate, not winged, oblong;

seed coat (reticulate), mucilaginous when wetted;

cotyledons incumbent.

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

cotyledons usually incumbent, rarely accumbent.

= 8.