1908
Bibliografía (20 obras)
Alaska Highway adventure
1981
New species and a new combination from the Bahamas, Caicos and Turks Islands
1977
Aquatic and wetland plants of southwestern United States
1972
The soils and vegetation of a relict area of Blackland Prairie
Manual of the vascular plants of Texas
1970
Flora of Peru
1967
Supplement to Orchids of Guatemala, and British Honduras
1965
The potato and its wild relatives
1962
Ferns and fern allies of Texas
1956
The search for plant precursors of cortisone
1955
Pteridophyta
Section Tuberarium of the genus Solanum of North America and Central America
1952
Native orchids of North America north of Mexico
1951
New middle American Solanums
1950
Collecting wild potatoes in Mexico
1948
Wild potato collecting in Mexico
A collection of plants from Louisiana
1941
A county check list of North Carolina ferns and fern allies
1940
A county check-list of Florida ferns and fern allies
1938
The Orchids of North Carolina
1937
