Manual of the Botany (Phaenogamia and Pteridophyta) of the Rocky Mountain Region: From New Mexico to the British Boundary

Plants: A Text-book of Botany

Plants: A Text-book of Botany

Plant Relations: A First Book of Botany

Botany of Western Texas: A Manual of the Phanerograms and Pteriodophytes of Western Texas, Volume 1

Preliminary Revision of the North American Species of Cactus, Anhalonium, and Lophophora: Volume 3

Evolution, Heredity and Eugenics

Revision of North American Hypericaceae

Botany of Western Texas: A Manual of the Phanerograms and Pteridophytes of Western Texas

Plant Structures: A Second Book of Botany

Preliminary Revision of the North American Species of Echinocactus, Cereus, and Opuntia

A Text-book of Botany for Secondary Schools

Manual of the Botany (Phænogamia and Pteridophyta) of the Rocky Mountain Region: From New Mexico to the British Boundary

New Manual of Botany of the Central Rocky Mountains (vascular Plants)

Plant Studies: An Elementary Botany

Botany

Plant Studies: An Elementary Botany

Plant Relations: A First Book of Botany

New Manual of Botany of the Central Rocky Mountains (vascular Plants)

The Phylogeny of Angiosperms: Volume 10, Issue 11