Cardamine parviflora is an annual or biennial, stems mostly solitary, to 30 cm tall.
Leaves alternate, pinnate, to 4 cm long with 3-6 pairs of leaflets, leaflets of rosette leaves sparsely toothed.
Flowers white, 4-parted, petals to 0.3 cm long.
Fruit capsules to 3 cm long, less than 0.1 cm wide, seeds 26-46, less than 0.1 cm, April-Aug.
Wetland status: FACU.
Frequency in NYC: Very infrequent.
Habitat: Dry sandy soil, sun or shade.