We report occurrences of Orobanche grenieri (Orobanchaceae) in the Lesser Caucasus in southern Georgia (western Asia), and in Badakhshan in Tajikistan (central Asia). These localities are more than 3000 and 5000 km apart from its previously known distribution areas in Spain and France, respectively. We used morphological evidence as well as nuclear ribosomal ITS and plastid rbcL sequences to test the taxonomic assignment of the Georgian plants to O. grenieri and to determine their phylogenetic position. We list the features that differentiate O. grenieri from morphologically similar species, provide illustrations, a distribution map, and we propose an IUCN conservation status for the Georgian populations.
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Vol. 52 • No. 5–6