Flora of North America species comparison

(1–)2–6(–10) dm.

erect [prostrate], branched distally, (angular [not angular]).

basal and cauline; petiolate and sessile;

basal rosulate or not, (and proximal cauline) petiolate, blade margins usually entire, crenate or lobed, rarely dentate or repand;

cauline sessile, blade (base auriculate or amplexicaul) margins entire, dentate, or lobed.

petiole (0.5–)1–7(–15) cm, (rarely ciliate basally);

blade usually lyrate-pinnatifid, (1–)1.5–6(–11) cm, lobes (0, 1, or) 2–4 (or 5) on each side, lateral lobes oblong or ovate, 0.2–1 cm × 1–5 mm, not fleshy, margins entire, terminal lobe 1.5–5 cm × 10–25 mm.

blade usually lyrate-pinnatifid (sometimes undivided and margins coarsely toothed or subentire), lateral lobes 1–4, (usually oblong or ovate, rarely lanceolate, to 2 × 1 cm), margins entire, (terminal lobe to 5 × 3 cm, margins usually entire or repand, rarely dentate); conspicuously auriculate, auricles ovate or narrowly oblong, (to 8 × 5 mm, margins entire).

(corymbose, several-flowered), considerably [slightly] elongated in fruit, (rachis striate).

sepals 2.5–3.5 × 1–1.5 mm, lateral pair slightly saccate basally, margins scarious, (subapically sparsely pubescent or glabrous);

petals yellow or pale yellow, oblanceolate, 5–7(–8) × (1.5–)2–3 mm, base attenuate, apex rounded;

filaments 3–4.5 mm;

anthers 1 mm;

ovules (24–)26–36 per ovary;

gynophore to 0.5 mm.

sepals (sometimes persistent), erect [spreading], oblong [ovate, linear], lateral pair saccate or not basally, (apex often cucullate);

petals yellow or pale yellow [creamy white], spatulate or oblanceolate, (longer than sepals), claw obscurely differentiated from blade, (apex obtuse or rounded);

stamens tetradynamous;

filaments (yellow), not dilated basally;

anthers oblong, (apex obtuse);

nectar glands (4): lateral annular, median toothlike.

erect or ascending, (2–)3–6(–7) mm, terete or subquadrangular, stout, (narrower than fruit).

(sometimes absent), erect to divaricate, slender or stout.

erect to erect-ascending, rarely appressed to rachis, torulose, terete to subquadrangular, (2.5–)3.1–4(–4.5) cm × 1.5–2 mm;

style stout, 0.5–1.2(–2) mm.

siliques, sessile or shortly stipitate, usually linear, rarely elliptic-linear, smooth or torulose, terete, 4-angled, or latiseptate;

valves each with prominent midvein and distinct marginal veins, usually glabrous, rarely pubescent;

replum rounded;

septum complete;

ovules 16–52 per ovary;

style obsolete or distinct;

stigma capitate, (sometimes slightly 2-lobed).

brown, somewhat plump, ovoid or oblong, 1.2–1.5 × 0.9–1 mm.

uniseriate [sub-biseriate], plump or slightly flattened, not winged [winged or margined], oblong, ovoid, or orbicular;

seed coat (reticulate or, rarely, tuberculate), not mucilaginous when wetted;

cotyledons accumbent.

= 8.

= 16.