Echinopsis subdenudata f. cristata 'Frosty Top' (syn. subdenudatus)Echinopsis subdenudata f. cristata 'Frosty Top' is a unique crested cactus with dense, white spination that gives it the striking appearance of a snow covered mountain ridge. Originating from a mutation in the standard Echinopsis subdenudata, this rare form has a fascinating, undulating structure combined with a frosty, woolly texture. Care Tips Light: Prefers bright, indirect sunlight or partial shade; excessive direct sun can scorch its spines.