got these guys to bloom for me. So far the ones kept inside under lights have not. It sort of suggests that they might be seasonal regulated by either temperature or daylength.
Actually it looks like 1/3rd U. sandersonii, 1/3rd U. nephrophylla & 1/3rd U. longifolia (imho) ...Looks like a small version of U. longifolia.
(wish I could easily remember how to do thumbnails on photobucket)