Ranunculus bulbosus is a perennial herb to 60 cm tall, from a corm-like, bulbous base, roots thickened, stems erect, hairy.
Leaves alternate, basal leaves long-stalked, 3-parted, terminal leaflet stalked, leaflets deeply lobed, stem leaves progressively simpler and narrower, becoming sessile.
Flowers yellow, long-stalked, petals widest above middle, to 1.4 cm, anthers numerous, to 0.3 cm long.
Fruit dry achenes, flattened, essentially smooth, to 0.3 cm with a small curved beak.
Wetland status: UPL. Occasional
Frequency in NYC. Infrequent.
Habitat: Woodland edges, lawns, meadows.
Notes: Seeds and plants eaten by many birds and mammals (Martin et al. 1951). Contains the toxic oil protoanemonin (Kingsbury 1964).