Mark, Thanks for the PDF reference. Excellent information and a nice new addition to the library. Thanks even more for the list of names of species of this type. A. karataviense is one of my favorites. I've also got A. k. 'Ivory Queen' here, which is equally lovely. Adding their brethren to them would be a wonderful goal... Carlo A. Balistrieri, Executive Director The Gardens at Turtle Point Tuxedo Park, NY 845.351.2849 Zone 6 visit: http://www.botanicalgardening.com/ and its BGBlog coming soon: Carlo Balistrieri Photography