The South Australian Herb Society have a/the? collection of salvias and have made quite a study of them. You might be able to contact them via http://www.gardenclubs.org.au/club_sa.html There are lots of salvias. A year or two ago a book was written called "Salvias" You might find it on one of the web book shops (use an Aussie or NZ one) Michael Bailes |
Here is a link that might be useful: The Fragrant Garden