Thanks Christiaan...very interesting information. By that account, I've got three specimens that appear relatively distinct. Despite growing under identical conditions, they've maintained their appearance--so I'd say it's NOT an environmental factor that modified their morphology. I'm sowing seed of what is purported to be B. v. nana within the next few days and will have yet another set of plants to look at. It will be most interesting to observe seedling variation. It will be my first experience with the genus from seed. Carlo A. Balistrieri The Gardens at Turtle Point Tuxedo Park, NY 10987 Zone 6 (845.351.2849) Visit: http://www.botanicalgardening.com/ and its BGBlog