Abstract
The diploid chromosome number of 17 spp. and 1 var. of Cyrtanthus was 16. The chromosome number of 12 spp. was reported for the 1st time. The idiograms vary from asymmetric to nearly symmetrical, and this change coincides with a change in flower shape. There is much similarity in karyotype structure, number, and flower structure in Cyrtanthus, Vallota, and Anoiganthus. It is suggested the 3 genera are congeneric and should be combined under Cyrtanthus by making a few minor changes in the description of Cyrtanthus. The combination C. herrei proposed by Pyer is supported by cytological evidence.

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