The white grape variety originates from France. Although it has slight morphological differences in its leaves and shoots compared to Chardonnay, it has an identical DNA profile. Morillon can be described as a variety or clone of Chardonnay. It is listed in the VIVC catalogue as an independent variety with the synonyms Alp Raisin and Raisin d'Alep. In Austrian Styria, Chardonnay is traditionally referred to as Morillon and is still considered an independent variety there in some cases. However, both designations are also used by some producers in order to document a difference to a "better" quality wine, which is then labelled Chardonnay. In the other Austrian provinces, however, the name Morillon plays no role.
For me, Lexicon from wein.plus is the most comprehensive and best source of information about wine currently available.
Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)