Haseltonia 05

Contents

  • Ariocarpus revisited by Edward F.Anderson and W.A.Fitz Maurice
  • Chromosomes and hybrids of Echeveria V. Series Valvatae Moran and Ciliatac Moran by Charles H.Uhl
  • Comparative anatomy of Neoraimondia roseiflora and Neocardenasia herzogiana (Cactaceae) by James D.Mauseth and Roberto Kiesling
  • New taxa and combinations in Echeveria (Crassulaceae) by Myron Kimnach
  • The genus Sedella Britton & Rose (Crassulaceae) by Reid Moran
  • The hybrid origin of xEpinicereus cooperi (Cactaceae) refuted using gel blot hybridization of random amplified polymorphic DNAs by Matthew A.Metz, Michael W.Froblich, Myron Kimnach and Elliot M.Meyerowitz
  • Sedum jurgensenii (Hemsl.) Moran (Crassulaceae) by Reid Moran
  • Convergent adaptive morphology of a Sonoran Desert cactus (Peniocereus striatus) and an African spurge (Euphorbia cryptospinosa)by Richard Felger and James Henrickson
  • Sedum goldmanii (Rose) Moran (Crassulaceae) by Reid Moran
  • Validation of the name xGasteraloe sculptilis (Aloaceae) by Leonard E. Newton
  • Review: Toward a consensus classification of the Crassulaceae, by Urs Eggli, Henk't Hart and Reto Nyffeler by Reid Moran

 

Front Cover: Our photo of Aloe melanacantha Berger, a member of the African family, Aloaceae, strikingly emphasizes the remarkable (though merely convergent) similarity of aloes to species of the New World genus, Agave (Agavaceae). Although aloes may he alpines (as in A. polyphylla, pictured on the cover of Haseltonia 4), tropicals or cliff-hangers, the spiny, ball-like rosette of A. melanacantha suggests a hot and desiccated habitat; this is confirmed by Reynolds (The aloes of South Africa, 1950), who states that it grows in the most arid part of the country. In 1689 it and A. variegata were the first South African aloes to be illustrated, yet, because of its adaptation to a harsh habitat,A. melanacantha is seldom cultivated successfully. Although this species is also found in Namibia, our cover plant was photographed in 1997 by John N.Trager at Naroegas, ca. 50km WNW of Springbok, North Cape Province, S. Africa.    

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