Ditto on Ian's comments on Iris books.
But the best iris book and the best value for money is 'World of Irises'
available for only $20 from AIS.
I, too, was a bit unhappy with the translation of Kohlein. Some of it is
just clumsy (almost like a literal translation) and some of it does not
make any sense. But these passages are rare. I like Kohlein's accounts of
his plant-hunting expeditions! The color pictures are exceptionally nice
(this is a shortcoming of 'World of Irises,' the color pictures are mostly
"mug shots" of varieties. You can get those in Cooleys or Schreiners
I would like to add to the list 'Growing Irises' by Cassidy and Linnegar.
An English book, it is now probably out of print. But it tackles the
subject from the gardener's, not the botanists, viewpoint. The cultural
advice is English, of course, so American readers beware.
Department of Biology
Hampden-Sydney VA 23943