Solidago ulmifolia is a perennial herb to 1.2 m tall, stems mostly solitary or in pairs, smooth below inflorescence.
Leaves alternate, to 12 x 5.5 cm, loosely hairy below, numerous, thin, elliptic to lance-shaped, tip pointed, base abruptly contracted to stalk, margin sharply toothed, lower leaves soon deciduous, smaller than more persistent, leaves in middle of stalk, upper leaves progressively reduced, with small numerous leaves below inflorescence.
Flowers yellow, of two types in small heads, rays 3-5, tiny, disk flowers 4-7, bracteate base to 0.4 cm tall; inflorescence. Sparsely branched, branches curved, flowers crowded along one side; blooms Aug.-Nov.
Fruit dry achenes, plumed, wind-dispersed.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Habitat: Dry, rocky soil of open woods.