Helonias bullata is a perennial monocotyledon herb, flowering stem to 1 m tall, unbranched, hollow.
Leaves basal, to 30 cm long, semi-evergreen, lance-shaped, stem leaves bract-like.
Flowers pink, to 1 cm wide, 6-parted, fragrant, anthers blue; ffinflorescence a crowded, thick, oval spike 3-10 cm long, to 3 cm wide, at top of stem.
Fruit dry, 3-lobed, capsule, splitting open to release numerous seeds, 0.5 cm long.
Wetland status: OBL.
Frequency in NYC: Very infrequent (G3 globally rare, Federal LT).
Habitat: Planted by R. Lynch in a swamp forest and has proliferated. Seed originally from the natural population in western New Jersey.