Lynn, when you click on the "A" you are restricting your view to only plants that have a cultivar name that start with A. But the plant you are referring to does not even have a cultivar name at all.
Do you remember back when we tree mailed back and forth several times, trying to figure out what to do with the species that contain an "f/" field? We decided to standardize on what everyone else out there is doing, and include that information with the species.
With the plant "Sempervivum arachnoideum", the word "arachnoideum" is the species, not the cultivar.
With the plant Sempervivum 'Abba', the word "Abba" IS the cultivar.
