UW Burke Herbarium species comparison

Leaves alternate, numerous, ovate-oblong, 1.5-3 cm. long, pinnatifid, the segments narrow, entire to pinnatifid.

Leaves alternate, entire to dentate, the basal with blades up to 30 cm. long and 6-8 cm. broad, with petioles sometimes as long;

cauline leaves reduced, becoming sub-sessile and entire.

Inflorescence of many-flowered, crowded, axillary, bractless racemes 1-4 cm. long; pedicles slender, 1.5-2.5 mm. long;

sepals 4, spreading, 0.5 mm. long, deciduous;

petals 4, white, linear, minute;

stamens 2.

Inflorescence of numerous, bractless, much-compounded racemes; pedicles terete, much longer than the fruits;

sepals 4, early-deciduous;

petals 4, white, 1.5 mm. long;

stamens 6;

style almost lacking.

Silicles strongly wrinkled, 2 mm. broad and 1.5 mm. long, cordate and notched, inflated and slightly obcompressed.

Silicles ovate-rotund, 2 mm. long, strongly obcompressed, with a few soft hairs, not at all notched, tipped by the stigma.