A New Leather Flower from Illinois... by Paul C. Standley
Trees And Shrubs Of Mexico, Part 2
Flora of the Panama Canal Zone, by Paul C. Standley
Flora Of Yucatan
Studies Of Central American Plants
Studies of Tropical American Phanerogams. No. I. By Paul C. Standley
Flora of Yucatan, by Paul C. Standley
Common Weeds, by Paul C. Standley,...
The "Rubiaceae" of Bolivia, by Paul C. Standley,... B. E. Dahlgren,... Editor
Flora of Costa Rica... by Paul C. Standley,... B. E. Dahlgren... Editor
The "Rubiaceae" of Ecuador, by Paul C. Standley,... B. E. Dahlgren,... Editor
Flora of Guatemala
Flora of New Mexico. by E.O. Wooton and Paul C. Standley
Studies of Tropical American Phanerogams. No 3. By Paul C. Standley
The "Cyperaceae" of Central America, by Paul C. Standley,... B. E. Dahlgren,... Editor
Flora of the District of Columbia and Vicinity. by A.S. Hitchcock and Paul C. Standley, with the Assistance of the Botanists of Washington
The "Rubiaceae" of Venezuela, by Paul C. Stanley,... B. E. Dahlgren,... Editor
Studies of American Plants... by Paul C. Standley,... B. E. Dahlgren,... Editor
I. Supplement to the Flora of Barro Colorado Island, Panama, Leslie A. Kenoyer and Paul C. Standley. II. Two New Species of Chara from Tropical America M. A. Howe
Honduran Mosses Collected by Paul C. Standley