Volume 16, Issue 1 (1997)This issue of Volume 16 was published 17th November, 1997.
The Euphorbiaceae of Sonora, Mexico
Victor W. Steinmann and Richard S. Felger
Karyotypes and Idiograms of Some Western North American Species of Lotus (Fabaceae)
William F. Grant
Vegetative Proliferation in Polypogon Monspeliensis (Gramineae)
Eric H. Roalson and Kelly W. Allred