Was looking at pictures and noticed that 'Dark Cloud' was listed as a tectorum. Since the pedigree is unknown and was in the batch of seedheads that included NO tectorum to my knowledge, I don't think this is a proper designation. Certainly there is no collected tectorum at all like this. Similarly I don't think a plant should be called an arachnoideum species cultivar unless it is a verified to be that. Even in nature it's difficult to tell things =that contain SOME other species.
Anyway I'm not pointing fingers, but that's my opinion!
Kevin