Jim: Kubitzki lists 2-3 species for Leptochiton. There are line drawings of Flower and Ovary. If you really interested I'll scan and email to you privately. Native to SW Ecuador and NW Peru. Arnold Leptochiton seems to have two species, L. quitoensis and L. helianthus (this one, as the name suggests, has yellow flowers). The names are listed on the wiki but nothing more. Are any of you growing either of these? Jim McKenney