Cytology of Thirteen Taxa in the Genus Isodon (Lamiaceae: Nepetoideae) from China

doi:10.7677/ynzwyj201413237

Abstract

Abstract:

This paper reports the chromosome numbers of 11 species and two varieties of Isodon from 16 populations in China. For all taxa except Ilophanthoides var. graciliflorus, chromosome numbers are reported here for the first time. All taxa are counted as diploid (2n=24): Ialbopilosus, Icoetsa, Iflabelliformis, Iforrestii, Igesneroides, Ilophanthoides var. graciliflorus, Ioreophilus var. elongatus, Iparvifolius, Ipleiophyllus, Ipolystachys, Iracemosus, Iscoparius, and Iweisiensis. Thus, x=12 is inferred as the basic chromosome number of Isodon. In addition, the chromosome number 2n=48, which is newly recorded for the genus, is also reported in one population of Icoetsa, indicating the species to be diploid and tetraploid.

Key words: Chromosome number, Hengduan Mountains, Isodon, Polyploidy

CLC Number:

Q 942

XIANG Chun-Lei, CHEN Ya-Ping, Tsuneo FUNAMOTO, PENG Hua. Cytology of Thirteen Taxa in the Genus Isodon (Lamiaceae: Nepetoideae) from China[J]. Plant Diversity, 2014, 36(05): 561-568.

References

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