Elegant Rockcress - Boechera pauciflora
Arabis sparsiflora var. subvillosa, Arabis sparsiflora var. columbiana
Biennial or short-lived perennial with a simple to few-branched caudex. Stems 20–50 cm, terminal. Basal leaves oblanceolate, 2–4 cm long with dentate margins. Stem leaves linear-lanceolate, auriculate. Vestiture of dense, small, branched hairs on basal leaves and stem base, becoming glabrous above. Petals purple, 5–10 mm long. Fruits 25–50 × =1 mm, arcuate; pedicels with branched hairs, ascending to weakly descending; seeds narrowly wing-margined, in 1 row per locule (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Flowering in May and June.