| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| A field guide to wild flowers KwaZuluNatal and the Eastern Region | 978-0-620-21500-8 (0-620-21500-3) | 1998 |
| The complete field guide to trees of Natal, Zululand & Transkei | 978-0-620-17697-2 (0-620-17697-0) | 1993 |
| Trees of Southern Africa | 978-1-86872-291-4 (1-86872-291-0) | 1999 |