| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Flowering plants of the Southern Cape | Hardcover | 978-0-620-09975-2 (0-620-09975-5) | 1986 |
| Flowering plants of the Southern Cape | Paperback | 978-0-620-09976-9 (0-620-09976-3) | 1986 |
| More flowering plants of the Southern Cape | 978-0-620-19403-7 (0-620-19403-0) | 1995 |