Lyman B. Smith & Edward S. Ayensu: A revision of American Velloziaceae. (Smithsonian contributions to botany ; 30) (Washington, D.C.: Smithsonian Institution Press, 1976: figures 10) ;
Elaine R. S. Hodges & Guild of Natural Science Illustrators (U.S.): The Guild Handbook of Scientific Illustration (New York City, NY: John Wiley & Sons, 2003: IXf.) ;
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