ISBN 0 88192 651 5
This book is 219 paged.
With botanical and horticultural information combined.
Revision of the 2 genera and descriptions of all selections and hybrids produced over the years.
Including colour paintings and pencil sketches by Auriol Batten.
Royal Horticultural Society Plant Collector Guide
- By Goldblatt P, Manning J and Dunlop G
- Published 2004