CSSA VOL.73, November-December 2001 No.6 The vanishing thorn forests of Madagascar Part I Mark Salak Introducing a new Fellow: Roberto Kiesling Larry Mitich Succulent Flora of Southern Africa - Book Review Steven Hammer Whatever became of Congdonia Reid Moran Mammillaria nana a new look W.A. and Betty Fitz Maurice Superb Succulents Duke Benadom Richtersveld, the Enchanted Wilderness - Book Review Danile L.Mahr and Steven A.Hammer A new species of Rhytidocaulon (Apocynaceae-Asclepiadaceae) from south-eastern Yemen John Lavranos and Bruno Mies Sclerocactus mariposensis - Notes Larry W.Mitich Rebutia rebuttoned David Hunt A new Chihuahuan Desert hybrid prickly pear, Opuntia x rooneyi (Cactaceae) M.Patrick Griffith Bradleya 19/2001 - Book Review Michael Hawkes Index for Volume 73 Compiled by Phyllis Flechsig

Cover illustration. The Destruction of Madagascar's flora, outlined in Mark Salak's article in this issue, is well illustrated by this poignant photo of a native boabab Adonsonia za. This old specimen in its dormant leafless state, appears drowning in an ocean of the Mexican fiber plant , Agave sisalana, which, except for the uncleared strip at the right, has taken the place of the original thorn forest. Myron Kimnach took this photo near Berenty in September 1993.