From the Turkic loanwords in Hungarian the author selected those botanic terms which are peresent in Turkic and/or in Ossetic. Preference was given to those tree names which have palaeobotanic data. Twelve Hungarian tree names display Old Chuvash traits. Out of these names five, or perhaps six, can also be attested in Ossetic: the names of the 'ash tree', 'cornel', 'pear', 'blackthorn', 'bulrush', and 'hazel'. The name of the 'oak' is an Alanian loanword in Hungarian. The name of the 'reed' is not present in Hungarian, but the corresponding Ossetic word is a Turkic borrowing with Chuvash traits. On the basis of these data the author tried to fix a region where Hungarians, Turks, and Alans may have lived together in the 5th-7th centuries.