UW Burke Herbarium species comparison

Basal leaves 3-6 cm. long, the blades entire, obovate to nearly round, narrowed abruptly to broad petioles 2-3 times as long;

cauline leaves alternate, several, much reduced, oblanceolate.

Inflorescence of many-flowered, elongate, bractless racemes; pedicles 6-20 mm. long, ascending to reflexed, somewhat S-shaped;

sepals 4, purplish, stellate, the outer pair slightly saccate at the base;

petals 4, yellow, spatulate, 5-11 mm. long;

stamens 6;

style 4-7 mm. long.

Silicles strongly inflated, obcompressed, obtuse to truncate at the base, 5-7 mm. long and slightly wider, with a broad, open, apical sinus about 2 mm. deep.