See under autochthonous.
The Latin/Greek term (autós = self, chthón = earth) means "long-established, indigenous, native to the soil" and, in relation to geology and biology, "originating or occurring at the site of discovery" (the opposite is allochthonous, meaning originating elsewhere - not native to the site of discovery). A related term is "endemic" (endemie), which means "occurring locally" or "common in a particular area" (but not necessarily originating there). The term "autochthonous", often used in describing grape varieties, means in a narrower sense that the vine is almost exclusively or predominantly traditionally cultivated in a particular area, where it also originated or at least has a relatively long history and has acquired a certain cultural significance.
A variety is thus also considered autochthonous if it has been established for a very long time, even if it did not originate in the region in question. Many of these aspects apply to the so-called landraces. In a broader sense, older new varieties can also be considered autochthonous grape varieties....
Using the encyclopaedia is not only time-saving, but also extremely convenient. What's more, the information is always up to date.
Markus J. Eser
Weinakademiker und Herausgeber „Der Weinkalender“