Latin American Malvaceae - Malvoideae

Neotropical Flowering Plants

Chromosome Numbers, Phytogeography, and Evolution in Kosteletzkya (Malvaceae)

Publication Type:Journal Article
Year of Publication:2012
Authors:Blanchard, OJ
Journal:Rhodora
Volume:114
Pagination:37-49
Type of Article:Journal Article
ISSN:0035-4902
Keywords:Abelmoschus, chromosome numbers, classification, cytotaxonomy, evolution, Hibiscus, karyotype analysis, Kosteletzkya, Malachra, Malvaceae, malveae, malvoideae, Pavonia, phytogeography, polyploidy, sect furcaria, Thespesia
Abstract:

Kosteletzkya C. Presl includes 17 species that are about evenly distributed between Africa and the northern Neotropics. The seven species with known chromosome numbers are exclusively diploid (n = 19). Here, 47 new chromosome counts are reported and the nomenclature of five of the earlier-counted species is updated. The counts confirm chromosome numbers for six species and provide first counts for eight species. Four of the latter, all African, are tetraploids, and another African species is a hexaploid. Amphi-Atlantic distributions and polyploidy in other malvoid groups are considered. Polyploidy evidence suggests an African origin for the genus.

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