Nesom, G.L. 1992b. Erigeron and Trimorpha (Asteraceae: Astereae) of Nevada. Phytologia. 7(3): 203-219.

Nesom, G.L. 1992b. Erigeron and Trimorpha (Asteraceae: Astereae) of Nevada. Phytologia. 7(3): 203-219.

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