Calamophyllum in Z. Sukkulentenk. 3: 15, 28. 1927 sec. Hartmann (2001a)
A mysterious genus including three species. These were described by Haworth between 1795 and 1812. However, for two of the names no types have been selected yet, whereas for the third a drawing by Duncansan serves as a lectotype (Hartmann 2001a). The distribution of the genus is uncertain.