Author Affiliations +
Peter W. Fritsch,1 Timothy D. McDowell2
1Department of Botany, California Academy of Sciences, Golden Gate Park, San Francisco, California, 94118 ( ) pfritsch@calacademy.org
2Department of Biological Sciences, Box 70703, East Tennessee State University, Johnson City, Tennessee 37614 ( ) mcdowelt@mail.etsu.edu