Symphyotrichum urophyllum is a perennial 40-120 cm tall, from a root crown.
Leaves alternate, stalk long, blade 6-15 cm long, 2-6 cm wide, tip pointed, base lobed thick, margin toothed, upper leaves with unlobed base, stalk winged, or stalkless.
Flowers: ray flowers pale blue, 8-20, 4-8 mm long, bracteate base 4-6 mm long, bracts overlapping, tip and midrib green, heads numerous, crowded, stalks covered with small bracts, blooming Aug.-Oct.
Fruit dry, 1-seeded, achene, with tuft of hairs (pappus), wind dispersed.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Habitat: Dry open woods.