engleski

Hybridogenous origin of Serapias x todaroi Tineo: morphological and karyological evidences

The genus Serapias is monophyletic genus with Mediterranean distribution. While consisting of morphologically similar taxa, the number of recognised species varies greatly between authors. 26 species and 23 hybrids are recognised by lumpers, of which nine are found in Croatia. S. x todaroi Tineo was described from Sicily by Tineo (1846). Later on, Camus (1908) established the name S. semilingua, indicating its hybridogenous origin between S. lingua and S. parviflora. In Croatian flora, S.x todaroi was discovered for the first time on Dalmatian island of Dugi otok in 2008 and after on the island of Mljet in 2010. On both localities S. x todaroi was found coexisting with hypothetical parental species. Twenty seven morphological (15 floral and 12 vegetative) characters were measured in populations of S. x todaroi, S. lingua and S. parviflora from Dugi otok and Mljet. Petal width, labelum length, epichile length, maximum epichile width, basal epichile width, plant height, inflorescence length and length of the longest stem leaves showed statistically significant differences among studied taxa. In respect to revealed characters, S. x todaroi evidently shows intermediate features between parental species. Intermediate chromosome number (2n=54) for S. x todaroi was detected, while parental species S. lingua possessed 2n=72 and S. parviflora 36 chromosomes.

Serapias; hybridisation; morphology; caryology

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