Perennials [annuals]; eglandular. Trichomes simple or forked, (minute). Cauline leaves petiolate or sessile; blade base not auriculate, (cuneate or attenuate), margins entire. Racemes bracteate, sometimes elongated in fruit. Flowers actinomorphic; sepals erect or ascending, lateral pair seldom saccate basally; petals white or lavender [pink, blue, or purple], claw present [absent], distinct; filaments unappendaged, not winged; pollen 3-colpate. Fruits silicles or siliques, dehiscent, unsegmented, latiseptate [terete]; ovules 6-8[-32] per ovary; style obsolete or distinct; stigma entire. Seeds biseriate [uniseriate]; cotyledons incumbent.

Genus 1, species 11 (1 in the flora): nw North America, Asia (Himalaya, Russian Far East).

Lower Taxon

• Aphragmus Andrzejowski ex de Candolle