calculus Knersvlakte (5)
calculus Knersvlakte (2)
calculus Knersvlakte (4)
calculus Knersvlakte
calculus Knersvlakte (3)
calculus (photo AJY)
calculus seed grown by Hiroshi Sudo
calculus NK s.n.
calculus NK s.n. (2)
calculus NK s.n. (3)
CONOPHYTUM, CRASSULA & ADROMISCHUS albums and growing guides by Chris Rodgerson