Flora of the District of Columbia and Vicinity. By A.S. Hitchcock and Paul C. Standley, With the Assistance of the Botanists of WashingtonPaul Carpenter StandleyAgotado4,3Notifícame
The Genera of Grasses of the United States: With Special Reference to the Economic SpeciesA. S. HitchcockAgotado4,3Notifícame
