| Taxonomic literature. A selective guide to botanical publications and collections with dates, commentaries and types. Volume 1: AG. FA Stafleu, RS Cowan | 3301* | 1976 |
| A DNA barcode for land plants CBOL Plant Working Group Proceedings of the National Academy of Sciences of the United States of …, 2009 | 3163* | 2009 |
| Flora ilustrada catarinense R Reitz As plantas. Fascic.: Calyceraceas 18, 1988 | 405* | 1988 |
| Flora ilustrada catarinense R Reitz Itajaí: Herbário Barbosa Rodrigues, 1970 | 317* | 1970 |
| RS 1976-1988 FA Stafleu, RS Cowan Taxonomic literature 2, 1-7, 1976 | 85 | 1976 |
| Detarieae DC.(1825) RS Cowan, RM Polhill Advances in legume systematics, 1981 | 75 | 1981 |
| Caesalpinioideae RS Cowan Advances in legume systematics 1., 57-64, 1981 | 70 | 1981 |
| Swartzia (Leguminosae, Caesalpinioideae Swartzieae) RS Cowan Flora Neotropica 1, 1-228, 1967 | 60 | 1967 |
| Taxonomic literature, ed. 2, vol. 3 FA Stafleu, RS Cowan Regnum Vegetabile 105, 1981 | 54 | 1981 |
| Swartzieae DC.(1825) RS Cowan Advances in legume systematics, 1981 | 51 | 1981 |
| Rutaceas. RS Cowan Flora ilustrada catarinense 89, 1973 | 40 | 1973 |
| A monograph of the genus Eperua (Leguminosae-Caesalpinioideae) RS Cowan Smithsonian Institution Press, 1975 | 39 | 1975 |
| Swartiza (Leguminosae, Caesalpinioideae Swartzieae) RS Cowan | 39 | 1968 |
| A taxonomic revision of the genus Macrolobium (Leguminosae-Caesalpinioideae) RS Cowan New York Botanical Garden, 1953 | 36 | 1953 |
| Amherstieae Benth. emend. J. Léon (1957) RS Cowan, RM Polhill Advances in legume systematics, 1981 | 35 | 1981 |
| Studies in Tropical American Leguminosae-IX RS Cowan Brittonia, 291-304, 1985 | 32* | 1985 |
| Vol. II: H-Le FA Stafleu, RS Cowan Regnum vegetabile ( 98, 1979 | 27 | 1979 |
| Howell, Thomas Jefferson, Bibliography and Biography References FA Stafleu, RS Cowan Taxonomic literature 2, 350-351, 1979 | 27 | 1979 |
| Taxonimic literature. A selective guide to botonical publications and collections with dates, commentaries and types R Cowan Didot Jeune, 1804 | 26* | 1804 |
| New taxa of Leguminosae-Caesalpinioideae from Bahia, Brazil RS Cowan Brittonia, 9-14, 1981 | 24 | 1981 |
