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First report on the flora of Wyoming (1896)
The Trees of Wyoming and How to Know Them (1899)
The Red Desert of Wyoming and its forage resources (1898)
The Flora of Montana (1900)
The Cryptogams of Wyoming. A Preliminary Report upon those Species (1900)
The Brome-Grasses of Wyoming (1901)
An Analytical Key to Some of the Common Flowering Plants of the Rocky Mountain Region (1902)
Spring Flora of the Intermountain States (1912)