Principle ampelographic data has been selected to characterize vine varieties. This criteria is described in accordance with the code of descriptors recognized by the Interntaion Organization of Vine and Wine (O.I.V.), The Union for the Protection of New Varieties of Plants (U.P.O.V) and Bioversity International.
Photographs of leaves and grape bunches have been taken under natural conditions, on the vine trunk in situations very close to growing conditions (sandy soil – Mediterranean coast) :
- Domaine de l'Espiguette (IFV), Le Grau de Roi (Gard),
- Domaine de Vassal (INRA), Marseillan (Hérault),
- Campus de la Gaillarde (Montpellier SupAgro), Montpellier (Hérault).
Only a few photographs have been taken in other vine growing areas.
The growth stages indicated are the result of obsrvations made at the Domaine de Vassal Estate where the set of these varieties form a collection. The results are indicated compared to the Chasselas vine variety as a reference in order to make comparisons between years and different sites. As such, for information purposes, the dates for the Chasselas B growth stage at Domaine de Vassal are as follows:
- bud burst, 21 March (average over 50 years)
- grape maturity, 14 August (average over 50 years)
The size of grape clusters and berries indicated are based on the following scales:
|Wine grape varieties||Table grape varieties|
|Size||Bunch (g)||Berry (g)||Bunch (g)||Berry (g)|
|Very small||≤ 100||< 1||< 150||< 2|
|Small||100 - 200||1,5 - 2||150 - 250||2 - 3,5|
|Moderate||200 - 250||2 - 2,5||250 - 400||3,5 - 5,5|
|Large||250 - 400||2,5 - 3,5||400 - 700||5,5 - 8|
|Very large||> 400||> 3,5||> 700||> 8|
Comments concern wine characteristics generally based on wine tastings.