Com promis la réponse de J.Pilbeam
Hello Luc,
The new book on Sulcos should be available by the middle of next month. It has over 200 colour photographs showing the incredible range of this genus. It is about the size of the British journal, with 4, 5 or 6 pictures to a page, so they are a good size. It includes an Introduction, a piece by David Hunt on the distribution as well as a map of the area they grow in, and captions by me giving brief details of the plants and their history in the literature where appropriate.
I think it will be good value.
Best regards,
John
Lucl