ERIGERON MONTANENSIS MIL E. Canby & Rose, Bot. Gaz. 15: 65. 1890. Not E. Tway! Canby, Bot. Gaz. 13: 17. 1888.
This species has been collected again in Montana by J. Flodman, at the following stations ; Elk Mountains, no. 837 ; Little Belt Mountains, near the Pass, no. S38.