CSSA VOL.74, May-June 2002 No.3 x Myrtgerocactus lindsayi - a natural hybrid Bob Ressler A new shade-loving species of Cheiridopsis N.E.Br Steven Hammer Book Review - Succulents in South Africa: Aguide to Regional Diversity Leo Martin Aloe hoffmannii Lavranos and Aloe rebmanii Lavranos, two new aloes from Madagascar John J. Lavranos James Harvey Callander and his rare publication : Cactus Culture for Amateurs (1906) Colin C. Walker A letter to the Editor W.A. & Betty Fitz Maurice Parkas? Ice picks? Oxygen bottles? A cactus expedition in highland Peru - Part 2 James D. Mauseth & Carlos Ostolaza Studies in the Opuntioideae (Cactaceae) - Book Review Myron Kimnach Cactus Culture - Book Review Myron Kimnach An ecological account of Ceropegia craibii - a rare and beautiful species from Natal, South Africa Charles Craib Superb Succulents Duke Benadom Othonna pavelkae (Compositae) a new and unusual species from Namaqualand, South Africa John J. Lavranos The Cycads - Book Review Myron Kimnach

Cover illustration: Pediocacti are amonst the most popular of cacti despite their samll size and difficulty of culture. To facilitate their cultivation they are sometimes grafted, although this often results in an unnatural appearance. Pediocactus simpsonii is the most widespread species in nature yet it is the smaller taxa that are most commonly found in collections. We have shown several on our journal covers, nearly all of them photos by Rob Skillin, and here we present another by him of Pediocactus knowltonii, nestled among detritus in northern Mexico.