Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1993)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1998)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1997)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2001)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2009)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2011)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2012)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2014)