UW Burke Herbarium species comparison

Leaves alternate, mainly cauline, numerous, 2-10 cm. long, oblong-ovate to oblanceolate, repeatedly compound into linear segments 1 mm. long.

Leaves alternate, mainly cauline, broadly lanceolate to oblanceolate, the lower petiolate, 3-10 cm. long, bipinnate-pinnatifid to pinnate-pinnatifid, somewhat toothed, the segments linear or a little broader; upper leaves reduced, usually pinnatifid into linear segments.

Inflorescence of bractless racemes that are often half the length of the plant; pedicles slender, about 10 mm. long;

sepals 4, spreading, 2-2.5 mm. long, greenish;

petals 4, yellowish, filiform, spatulate, shorter than the sepals;

stamens 6, well exerted;

stigma sessile.

Inflorescence of bractless racemes; pedicles 3-18 mm. long, spreading and often bent to ascending;

sepals 4, 1-2 mm. long, spreading;

petals 4, pale to bright yellow, 1.5-3.5 mm. long;

stamens 6;

style inconspicuous.

Siliques nearly erect, terete, linear, 2-3 cm. long and 1-1.5 mm. broad, somewhat lumpy, rounded at the tip;

seeds in 1 series.

Siliques 4-20 mm. long and about 1.5 mm. broad, narrowly elliptic in outline, rounded at the tip;

seeds in 2 series at mid-length.