Don't count on the s. flava not being var. rubricorpora. I have 4 plants from an s. flava var. rubricorpora that is the classic look of the variety. Out of this selfed flower came a ton of seed. Three years later, out of all those babies (who have homes in the general area now), 4 looked like var. atropurpurea they were so fully colored. By varietal standards, they would have to be called var. atropurpurea. However, I selfed the plant myself, and bagged the bloom, and know nothing else pollinated it, and know the plant IS rubricorpora, but thank God for genetics, because sometimes you get thrown some real beauties, and these 4 were deep red-purple, top to bottom, inside and out. Still rubricorpora, but because of varietal description, you now have an atropurpurea. NOT SO, but it can fool you but good where these varity names are concerned. I know what they are, but those who have not experienced seed germination, and growing them out, might never see the vast color forms, within the forms!!!!