| Editorial |
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| Society Matters |
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| Orbea and Stapelia in Botswana | Bruce J Hargreaves |
| Rediscovery of Caralluma dicapuae ssp. ukambensis, with a new Combination | Leonard E. Newton |
| 1998 ISI Plant Offerings | Harry Mays |
| A Question of Balance: When is a Caralluma a Caralluma and not a Caudanthera? | Colin C. Walker |
| Typification of Caralluma denboefii | Leonard E. Newton |
| Travels in Arabia - Part 4 Abha to Najran | Sheila Collenette |
| An Aberrant Record for Pentarrhinum abyssinicum ssp. angolense (Asclepiadaceae) from the Richtersveld in South Africa | Graham Williamson |
| A.A. Bullock and his Asclepiad Studies | Colin C. Walker |
| Tom Grumbley (1919 - 1997) | Len Newton |
| A New Species of Sarcostemma (Asclepiadaceae) from Northern Madagascar | Ulrich Meve & Sigrid Liede |
| Asclepiads in the Literature | Colin C. Walker |
| Book Review: The Genus Duvalia (Stapelieae) by Ulrich Meve | Philip E. Downs |
| Cover illustration:
Ceropegia dimorpha H. Humb. This illustration shows two types of growth which can be exhibited simultaneously by this plant which originates from the Isalo mountains, Madgascar. |
