Aster longifolius Lamarck var. villicaulis A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 189. 1884; A. johannensis Fernald var. villicaulis (A. Gray) Fernald; A. novibelgii Linnaeus var. villicaulis (A. Gray) B. Boivin

Plants relatively slender . Stems uniformly and densely hirsute (at least proximally). Leaf blades lanceolate to linear-lanceolate, 7–9 times as long as wide, bases clasping. 2n = 48.

Flowering Aug–Sep. Usually open, mostly calcareous, gravelly or rocky stream shores; 0–100 m; N.B., Que.; Maine.