There were 3 illustrations found for R. Cowing
2 723221 Orcuttia californica VaseyBull. Torrey Bot. Club, vol. 13 : t. 60 (1886) [R. Cowing]
2 870781 Redfieldia flexuosa (Thurb.) Vasey [80 478547 Graphephorum flexuosum Thurb.]Bull. Torrey Bot. Club, vol. 14 : t. 70 (1887) [R. Cowing]
2 727282 Orochaenactis thysanocarpha (A. Gray) Cov. [80 228321 Chaenactis thysanocarpha A. Gray]Contr. U.S. Natl. Herb., vol. 4 : t. 10 (1893) [R. Cowing]