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Iris rotschildii Degen (Iridaceae)-natural hybrid from Croatia.

The unique Croatian natural Iris hybrid recognised in literature (Degen, 1936 ; Mathew 1981) is stenoendemic species I. rotschildii Degen, whose supposed parents are species I. illyrica Tomm. (ser. Pallidae (A. Kern.) Trinajstić) and I. variegata L. (ser. Germanicae Lawr.). On single locality on the Mt Velebit (Sinokos) we found one relatively large population on which we researched morphological (flowers and leaves), anatomical (leaves), karyological (somatic chromosomes), molecular (DNA analyses) and palynological (light and SEM microscopy of pollen grains) features. Preliminary results and comparison with I. illyrica and I. variegata showed that I. rotschildii has some features as both parents, as well as some differences (e.g. number of chromosomes 2n=26 and colour of flowers) which can distinguish it from supposed parents, but hybridogenous origin is still doubtful and under investigation.

Iris rotschildii; hybrid; Croatia

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