UW Burke Herbarium species comparison

Basal leaves often form rosettes, petioles ciliate, blades oblong or oblanceolate, 1-3.5 cm long and 5-15 mm broad, margins dentate to finely toothed or occasionally nearly entire; varying amounts of pubescence above and beneath with cruciform trichomes and stalked trichomes with 2-3 rays;

cauline leaves generally 4-12 but sometimes 15, sessile, ovate or oblong, margins as basal, pubescent above and beneath, trichomes above as basal leaves and beneath mostly simple trichomes combined with 2-3-rayed trichomes.

Inflorescence racemose, usually 18-60 flowered, ebracteate, significantly elongated in fruit;

rachis rigid and straight, fully glabrous;

pedicels spreading, straight, 2-7 times longer than fruit, glabrous;

sepals 4, ovate, 0.9-1.6 mm long, scarcely pubescent with simple trichomes;

petals 4, yellow, narrower towards base with deep notches, 1.7-2.2 mm long and 0.6-1 mm broad;

anthers 0.1-0.2 mm, broadly ovate to slightly reniform.

Silicles 5-8 mm long and 1.5-2.5 mm broad, oblong to elliptic or occasionally narrower toward base, plane, somewhat flattened;

valves glabrous or pubescent with simple trichomes;

ovaries generally containing 36-60 ovules;

seeds ovoid, 0.5-0.7 mm long and 0.3-0.4 mm broad.