The Sedum parent plant entry, which has no plant information showing, applies only to sedums, but browsing by genus will show you all of the sedums and "former" sedums (because they have Sedum species listed as synonyms). The Sedum parent plant entry is not "way off," except that many of the photos in that entry need to be moved to other genera.
If you have plant information that applies to ALL sedums, let Dave know. He can add the info to the parent page, and it will automatically be copied to every child Sedum plant. It will not be copied to the Petrosedums, Hylotelephiums, and other plants once classified as sedums.
