Steven D Johnson

The pollination ecology of an assemblage of grassland asclepiads in South Africa.

Jeff Ollerton, J. Ollerton, S. Johnson, 2003, Annals of botany.

Three-dimensional geometric morphometrics for studying floral shape variation.

C. Zollikofer, H. Linder, S. Johnson, 2010, Trends in plant science.

Floral Mimicry Enhances Pollen Export: The Evolution of Pollination by Sexual Deceit Outside of the Orchidaceae

A. Ellis, S. Johnson, Steven D Johnson, 2010, The American Naturalist.