Pollen morphology of 6 species of the genus Tamarix was studied using light and scanning electron microscopy. Pollen grains of the studied species are 3-colpate, sometimes 3-colporate, prolate, spheroidal and oblate-spheroidal, small- and medium-sized, with reticulate exine sculpture. Some of the revealed taxonomically valuable features (size of pollen grains and colpi, particularities characters of exine sculpture) can be used as additional ones for identification at species level. Using palynological data to resolve controversial taxonomic issues in this genus is considered. However, despite similarities in morphological features of pollen grains (size of pollen grains, exine thickness and elements of exine sculpture) of T. odessana and T. ramosissima and differences in these characters of T. hohenackeri and T. smyrnensis, it is difficult to come to conclusions on the species status of T. odessana and, respectively, T. hohenackeri and T. smyrnensis. Their further study using various methods is required.

Keywords: Tamarix, pollen grains, morphology, taxonomy, Ukraine

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