Cronquist, A. 1947. Systematic treatment of the species: [Erigeron peregrinus-Erigeron nanus]. Brittonia 6(2): 142-192.
Cronquist, A. 1947. Systematic treatment of the species: [Erigeron peregrinus–Erigeron nanus]. Brittonia 6(2): 142-192.
Western Forbs
Cronquist, A. 1947. Systematic treatment of the species: [Erigeron peregrinus–Erigeron nanus]. Brittonia 6(2): 142-192.