Heunisch

Gouais blanc
Grape (Vitis)
Gouais blanc in Viala & Vermorel (as Gouget blanc)
Color of berry skin	Blanc
Species	Vitis vinifera
Also called	Heunisch, Heunisch Weiss, and (other synonyms)
Origin	Central Europe
Notable regions	formerly Germany and northern France
Notable wines	None, nearly extinct

Gouais blanc (French pronunciation: ​[ɡu.ɛ blɑ̃]) or Weißer Heunisch (German pronunciation: [ˈvaɪsɐ ˈhɔʏnɪʃ]) is a white grape variety that is seldom grown today but is important as the ancestor of many traditional French and German grape varieties. The name Gouais derives from the old French adjective ‘gou’, a term of derision befitting its traditional status as the grape of the peasants. Likewise, the German name Weißer Heunisch labels it as one the lesser, Hunnic grapes.

Gouais is known to have been widely planted in central and northeastern France in Medieval times. At this time, it was used to produce simple, acidic white wines, and were primarily grown in less good plots that were not suited for the much more highly regarded Pinot noir or Pinot gris. Gouais Blanc was thus the grape of the peasantry rather than of the nobility.

Its history before Medieval times is not known with any certainty, but is the subject of much conjecture, in similarity to many other grape varieties with a long history. Gouais blanc has been proposed as a candidate for the grape given to the Gauls by Marcus Aurelius Probus (Roman Emperor 276–282), who was from Pannonia and who overturned Domitian's decree banning grape growing north of the Alps. Another hypothesis claims it originates specifically in Croatia (or Pannonia), but the Vitis International Variety Catalogue currently lists it as originating from Austria, which should probably be interpreted as "likely to originate somewhere in Central Europe".

Gouais blanc was also grown in the Jura, but the Phylloxera epidemic wiped out the variety in France, and it now survives only in the INRA collection at Domaine de Vassal, Montpellier.