The taxonomy and type of Kalanchoe sexangularis N.E.Br. (Crassulaceae)

The taxonomy of Kalanchoe sexangularis N.E.Br. (Crassulaceae), a common southern Africa species, is clarified. We interpret K. sexangularis as consisting of two varieties, K. sexangularis var. sexangularis and K. sexangularis var. intermedia (R.Fern.) R.Fern. An amplified description is provided for the species and differences between the two varieties are noted. The type specimen, Thorncroft s.n. (K, holo-), which is to be associated with Kalanchoe sexangularis var. sexangularis, is established.