Dear Christopher; Greetings. I am sure you are very welcome to join this group, however you may want to look into the Aroid-email group. This is a group of gardeners who have an active email exchange devoted to aroids of all sorts including the tuberous genera you mention. You may want to join the International Aroid Society for even more. Check out: http://gizmoworks.com/mailman/listinfo/… to sign up and http://www.aroid.org/ for more info. By the way Typhonium diversifolium is probably an invalid name for a Chinese species. As I recall it is listed in the Flora of China (check that home page too) but what is grown here in the US under that name may be T. roxburghii http://aroid.org/genera/typhonium/… It is not hardy here in Zone 5. Best Jim W. -- Dr. James W. Waddick 8871 NW Brostrom Rd. Kansas City Missouri 64152-2711 USA Ph. 816-746-1949 Zone 5 Record low -23F Summer 100F +