Cardaria draba is a perennial herb to 60 cm tall, aggressively colonial from creeping rhizomes, stems erect, hairy below.
Leaves alternate, stem leaves egg-shaped, base lobed, stalkless, clasping stem, to 9 cm long, 4 cm wide, basal leaves to 10 cm, stalked.
Flowers white, 4-parted, to 0.4 cm; inflorescence branched.
Fruit dry, capsules heart-kidney-shaped, to 0.3 cm long, 0.5 cm wide, wider than long, flattened side-to-side with seam along center.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Habitat: Roadsides, open areas. An agricultural weed.