The paper examines the relationship between place names referring to the natural environment and plant names. It provides a comprehensive picture of the role of plant names in the formation of settlement names describing the natural environment: what form plant names take in early Old Hungarian settlement names, when and in what proportion they appear in early Old Hungarian sources, and what shifts in their frequency occurred over the centuries. The study also examines the spatial characteristics of the name type and the distribution of certain plant names. Summarising the results, it can be concluded that in the early Old Hungarian period, the settlement names derived from plant names were usually formed by adding suffixes to single words. Morphematic naming played the dominant role in the formation of these settlement names. A significant increase in the number of such settlement names can be seen from the beginning of the 13th century, and continued at a steady pace until the end of the early Old Hungarian period. Settlement names of botanical origin are relatively common and cover the whole Carpathian Basin. Settlement names also include names of various plants, but the frequency of certain plant names varies greatly.