Lepidium latifolium is a perennial herb, 1-2 m tall, colonial from rhizomes, plant usually waxy blue-green, mostly hairless.
Leaves alternate, narrow, basal leaves long-stalked, blade to 30 cm long, 8 cm wide, margins toothed, stem leaves stalkless, blade smaller, 1-4 cm wide, margins toothed to entire.
Flowers white, small, petals 4, 0.1 cm long, spatula-shaped; inflorescences of small, tight clusters at ends of branched inflorescence stalks.
Fruit dry, a small rounded hairy capsule 0.2 cm wide; fruiting Aug-Oct.
Wetland status: FACU.
Frequency in NYC: Very infrequent.
Habitat: Upper edges of disturbed salt marshes, coastal areas.