Sabatia angularis is a biennial herb, forming a rosette the first year, second year growing 30-80 cm tall, stout, hairless, usually with many opposite branches from the middle up, stem sharply 4- angled, winged, conspicuously 3-veined.
Leaves opposite, egg-shaped, 1-4 cm long, base rounded or slightly lobed.
Flowers pink, with a greenish eye, showy, regular, 5-parted, 2-4 cm wide, anthers linear, style elongate, petals more or less egg-shaped; flower stalks wing-angled, the wings continued up the base of the calyx; inflorescence an open, branched cluster July-Aug..
Fruit a dry capsule at first enclosed in old petals, eventually splitting in two.
Wetland status: FAC.
Frequency in NYC: Rare (NYS Rare S1, E).
Habitat: Moist, open meadows, sparse vegetation.