Volume 19, Issue 1 (2000)This issue of Volume 19 was published 28th July, 2000.
Map-Making of Plant Biomass and Leaf Area Index for Management of Protected Areas
Loretta Gratani and Maria Fiore Crescente
SEM Studies on Vessels in Ferns. 18. Montane Cheilanthoid Ferns (Pteridaceae) of North America
Sherwin Carlquist and Edward L. Schneider
Typification and Change in Status of Yucca Schottii (Agavaceae)
Lee W. Lenz and Michael A. Hanson