Chromosome Studies of Diploid and Polyploid Plants of Haworthia

Abstract

Chromosomes were studied, and the sporophytic numbers were obtained for 39 species, varieties, or unidentified plants of the genus Haworthia (Family Liliaceae, Tribe Aloineae). Twenty-nine plants are diploids, 1 is a triploid, 5 are tetraploids, 2 are pentaploids, and 2 are hexaploids. Thirteen of the determinations are new for species, 5 are new for varieties of species in which another variety had previously been counted, and 1 is new for a subvariety; 5 new or unidentified species and 3 unidentified varieties have been studied.