Cuscuta cephalanthi is a parasitic annual vine, stems coarse, yellow, high climbing. Plants lack chlorophyll.
Leaves reduced to scales, narrow, oblong, toothed from near base, tips blunt.
Flowers white, 0.2 cm, usually 4-parted, petal lobes egg-shaped, blunt-tipped, much shorter than tube, calyx lobes blunt, much shorter than petal tube; inflorescence of compact, crowded clusters.
Fruit dry, hollow, a rounded capsule, 0.3 cm, surrounded or crowned by old flower parts; Aug.-Sept.
Wetland status: NL.
Frequency in NYC: Rare (NYS S1, E).
Habitat: On shrubs (buttonbush?) and coarse herbs in wet areas.