Flora of Guatemala
Flora of Guatemala
Flora of Guatemala
Studies Of Central American Plants
Flora of Guatemala. Part VI. Paul C. Standley,... and Julian A. Steyermark,...
Common Weeds, by Paul C. Standley,...
A New Leather Flower from Illinois... by Paul C. Standley
Datos sobre el viaje botánico de los professores Paul C. Standley y Samuel J. Record a Costa Rica y Guatemala en 1925-1926
Studies of Central American Plants, III [to VII] by Paul C. Standley,... and Julian A. Steyermark,...
Vascular Plants of Texas
Flora of the Panama Canal Zone, by Paul C. Standley
Flora of Guatemala
The Rubiaceae of Colombia
The Cyperaceae of Central America
Studies of Central American Plants
Studies of American Plants
The Relationship of Asplenium Andrewsii
Plants of Glacier National Park. By Paul C. Standley
The "Rubiaceae" of Columbia, by Paul C. Standley,... B. E. Dahlgren,... Editor
Flora of Costa Rica, by Paul C. Standley,...