Chromosomes in the Oncocyclus Irises

Abstract
Chromosomes were examined and karyotypes were established for 47 of the 65 spp. recognized in Section Oncocyclus (Siems.) Baker of the genus Iris L. All species manifested a strinkingly similar, bimodal, asymmetric, chromosome complement (2n = 20). In spite of the considerable floral divergence in this section, the chromosomes remained basically unchanged.

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