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Mr. and Mrs. Tansley
Cowles and Tansley
[Botanists Henry C. Cowles (left) botanist from the University of Chicago, and Professor Arthur. G. Tansley, botanist from Cambridge, England, studying leaf formations during the International Phytogeographic Excursion in America].
Tansley, Botany Fieldtrip
Tansley, Akron, Colorado
[Sir Arthur and Mrs.] Tansley [walking in] Grama [and] Buffalo Grass [near] cactus, Akron, Colorado
Bulbilis dactyloides synonymy: Buchloe dactyloides; Images from the International Phytogeographic Excursion July-October 1913