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Chromosome Cytology of Oldenburgia (Asteraceae-Mutisieae)

Peter Goldblatt
Annals of the Missouri Botanical Garden
Vol. 74, No. 2 (1987), pp. 331-332
DOI: 10.2307/2399403
Stable URL: http://www.jstor.org/stable/2399403
Page Count: 2
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Abstract

As determined from root tip mitoses, three of the four species of the endemic Cape genus Oldenburgia have the same diploid chromosome number, 2n = 36, and a similar karyotype of small submetacentric to metacentric chromosomes. Base number in the genus is presumed to be x = 9, and Oldenburgia is probably a paleotetraploid relict. It has no close relatives in Africa, and it seems to be most closely related to a group of arborescent South American genera of Gochnatiinae, perhaps the most primitive subtribe of Mutisieae.

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