Origin	Berlandieri Las Sorres x Rupestris du Lot
Young Branch End	Semi-open, low density of prostrate hairs. Strong, generalised anthocyanin pigmentation.
Young leaf	Green with golden reflexes. Lower page of the fourth expanded leaf with low density of erect and prostrate hairs on the ribs, and low density of erect hairs between the ribs. Medium anthocyanin pigmentation of the first six leaves.
Shoot	Erect bearing. Red nodes and internodes with low density of prostrate hairs. Medium anthocyanin pigmentation of the buds.
Tendrils	Short. Discontinuous regular distribution with 02 formula.
Flower	Male.
Adult leaf	Reniform, small and whole. Medium green with medium anthocyanin pigmentation in the ribs. Involute blade, no blistering. Short, convex teeth. Very wide V-shaped petiolar sinus. Glabrous lower page with low density of erect hairs on the ribs. Upper page with erect and prostrate hairs on the main ribs. Low density of prostrate and erect hairs on the petiole.
	Round, striated, dark brown.
Characteristics	99 R is a vigorous rootstock, even more than Rupestris du Lot; however, it is less vigorous than 110 R. It’s an average producer of wood and its response to rooting depends on lignification problems. It has a good response to local grafting, but hand grafting is usually not well succeeded. This rootstock adapts well to medium limestone soils (up to 17% active limestone). It has medium resistance to drought and is sensitive to moisture, salinity and to the gall form of phylloxera. It has good resistance to the Meloidogynae type of nematodes. 99 R adapts well to difficult soils, whether gravel or not, even if they are very compact. It is, in general, better than Rupestris du Lot.

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