Chromosome numbers of 50 vascular plants in South Korea

Variation or constancy in the chromosome number within taxa of different categories have been proven to be important characters for taxonomic groupings. In order to expand the current knowledge on somatic chromosome numbers of South Korean vascular plants, chromosome counts were made for 50 species (38 genera of 17 families). The first chromosome information for Glaux maritima var. obtusifolia Fernald, Hemerocallis hakuunensis Nakai, Hylotelephium verticillatum (L.) H. Ohba, Orostachys iwarenge f. magnus Y.N. Lee, and Teucrium viscidum var. miquelianum (Maxim.) Hara is presented. New chromosome numbers compared with previous studies are also counted in Aconitum pseudolaeve Nakai, Securinega suffruticosa (Pall.) Rehder, and Tricyrtis macropoda Miq., respectively. In addition, Eupatorium japonicum Thunb. is proven to show polyploidy with tetra- and pentaploid. Among studied species, the diploids (66%) and tetraploids (24%) prevail.