There were 2 illustrations found for O. Ceska
913673Saxifraga tridactylites L.
Canad. Field-Naturalist, vol. 89 : p. 453, fig. 1 (1975)
1018017Crassula connata Donn
[Tillaea erecta Hook. & Arn.]
Canad. Field-Naturalist, vol. 94 : (1980)
9136731018017