Heliopsis helianthoides is a perennial herb, 50-150 cm tall.
Leaves opposite, stalks 0.5-3.5 cm long, blade 5-15 cm long, 2.5-8 cm wide, egg-shaped, tip long-pointed, base blunt, 3-veined, margin toothed, rather smooth above.
Flowers pale yellow, rays 8-16, 1.5-4 cm long, fertile (i.e. with stigma and ovary) disk 1-1.5 cm high, 1-2.5 cm wide, basal bracts of flower heads leafy, 0.3-0.6 cm long, base rigid; blooms and fruits July-Sept.
Fruit dry, 1-seeded achene, 4-angled 0.5 cm long, persistent ray flowers often attached.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Habitat: Open woods, thickets.