Cuscuta pentagona is a parasitic annual vine stems pale, very slender, no chlorophyll.
Flowers white, 5-parted, to 0.2 cm, somewhat glandular, petal lobes 0.1 cm, narrow to triangular, about as long as the petal tube, tips long-pointed, usually bent outward with ends bent upward, calyx about as long as petal tube, nearly enclosing it, calyx lobes often broader than long; inflorescence often on short stalks, in compact head-like clusters.
Fruit dry, hollow capsule, rounded, top flattened, base shallowly cupped by old flower parts, 2-seeded; blooming and fruiting June-Oct.
Wetland status: NL.
Frequency in NYC: Rare (NYSS1, E).
Habitat: On herbaceous plants in dry open soil.
Notes: Listed as a noxious weed by the USDA (USDA 2004).