R. Cowan

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Acacia Miscellany 10. New taxa and notes on previously described taxa of Acacia, mostly section Juliflorae (Leguminosae : Mimosoideae), in Western Australia

B. Maslin, R. Cowan, 1995 .

A Revision Of The Genus Bocoa Caesalpinioideae Swartizieae

R. Cowan, 1974 .

Candolleodendron, a new genus of the Leguminosae (Caesalpinioideae)

R. Cowan, 1966 .

Harleyodendron, a new genus of leguminosae (Swartzieae)

R. Cowan, 2008, Brittonia.

Guide to the vascular flora of Illinois

R. Cowan, R. Mohlenbrock, 1975 .

New taxa of Leguminosae-Caesalpinioideae from Bahia, Brazil

R. Cowan, 1981 .

Studies in tropical American Leguminosae—IX

R. Cowan, 1954 .

Rose and Britton: From Brittonrosea to Cassia

R. Cowan, Frans A. Stafleu, 1981 .

Studies of tropical American Leguminosae-VIII

R. Cowan, 1977 .

Plant explorations of G. Wilson-Browne, S. J., in British Guiana. I. Kanuku mountains

R. Cowan, 1952, Brittonia.

New Species and New Records of Plants in Guiana

R. Cowan, 1957 .

Biological Identification with Computers

R. Pankhurst, W. D. Clayton, R. J. Pankhurst, 1976 .

Dictionary of Theoretical Concepts in Biology

R. Cowan, K. Roe, R. Frederick, 1981 .

Forecasting change using an interregional homogeneity index

R. Cowan, 1973 .