| CSSA Haseltonia 6, 1998 |
|---|
| Notes on the genus Blossfeldia (Cactaceae) in Argentina | Beat Ernst Leuenberger & Urs Eggli |
| Plectranthus fasciculatus (Lamiaceae), a new species from north-eastern Queensland, Australia | Paul I. Forster |
| A new cholla from Baja California | Jon P. Rebman |
| The effectiveness of two bat species as pollinators of two species of columnar cacti on Curacao | Sophie Petit |
| Chromosome numbers in some cacti of western North America -- VII | Donald J.Pinkava, Jon P.Rebman & Marc A.Baker |
| Ethnobotany of Stetsonia coryne (Cactaceae), the "cardón" of the Gran Chaco | Pastor Arenas & Gustavo Scarpa |
| Stem-surface sculpture: a potentially valuable character in some cacti as
shown by a survey of stem microstructure | Hugh Glen & David Hardy |
| Chromosomes and hybrids of Echeveria (Crassulaceae) VI. Series Angulatae Walther and Pruinosae Walther | Charles Uhl |
| Propagation of Mammillaria candida by tissue culture techniques | Miguel Angel Alías-Rocha, María del Socorro Santos-Días & Alberto Arredondo-Gómez |
| Euphorbia gradyi (Euphorbiaceae), a new stem-succulent euphorbia from Mexico | Victor Steinmann & Angélica Ramírez-Roa. |
| Notes on Archer's (1992) Kenya Ceropegia Scrapbook | Patrick Siro Masinde |
| COVER: Many South African succulents lead an almost subterranean existence, with only their leaf-tips emergent,
thus lessening dessication in hot, arid habitats. However, the resultant disadvantage is that less light is available. There are species of
Aizoaceae (Lithops, Conophytum, Fenestraria, Frithia) and of Asphodelaceae (Bulbine) that avoid this problem by means of transparent
leaf-tips,which allow sunlight to penetrate below ground to the chlorophyll-bearing portion of the leaves.
Our cover photo shows a species from yet another family with "window plants", the Aloaceae. Haworthia cooperi, with
remarkably glass-like leaf-apices, inhabits the dry grassveld of the Eastern Cape of Soth Africa. The photo by John Trager is of a
plant, cultivated by Kobus Venter (#91/85/2), originally from west of Ft. Brown, South Africa. | |
