Known until very recently as Haworthia variegata var. petrophila, recent field work by Bayer has established that this species more rightly belongs in the newly reestablished genus rossouwii.  I have two of these plants and this species has a reputation of being difficult.  the plant pictured is small and in a winter rest, so I will report back in a year or so as to my success with this species.  

Photo 01/19/02