CEPAGES. 107 



and slightly oblique to the plane of the limb. Seeds small; 

 berries covered with bloom; trunk much stronger than 

 that of the glabrous Riparias. They comprise two 

 subdivisions : 



i st. Tomentose Riparias with large leaves, the most vig- 

 orous, growing generally on the cool parts of river banks; 

 they constitute excellent grafting-stocks. Ex.: Riparia 

 Scribner, one of the most vigorous and meritorious. Gen- 

 erally speaking, these Riparias grow better in damp soils 

 than the glabrous Riparias; their trunk is often very large. 

 The forms having violet wood are more vigorous than those 

 with grey wood. 



2nd. The Tomentose Riparias with small leaves, which 

 grow in dryer places, in the crevices of rocks; their leaves 

 are thicker, of a less intense green, and dull on the upper- 

 face; they are little vigorous in the wild state. 



GLABROUS RIPARIAS. 



These are very varied, and comprise two sub-groups: 

 i st. Glabrous Riparias with lobed leaves. The leaves 

 have either three or five lobes, sinus deeply incised, generally 

 small, ribs more or less deep rose colour. Ex.: V. Palmata 

 of Vahl. In general, all the Riparias with lobed leaves 

 have little vigour and are inferior for culture to other wild 

 forms. 



2nd. Glabrous Riparias with entire leaves. The upper 

 lobes are detached by the shallow lateral triangular sinus, 

 the other lobes are indicated by a great prolongation 

 of the extremities of the teeth. We divide this sub-group 

 into : 



(a) Riparias with small leaves; leaves dull-green, slightly 

 dark on the upper-face; teeth acute and oblique to the 

 plane of the limb; parenchyma varying in thickness in- 

 dividually; very subject to chlorosis and punctuated anthrac- 

 nosis, and without any value as grafting-stock. 



(b) Riparias with large leaves, for the greater part graft- 

 ing-stocks of much value, the most propagated in culture; they 

 may be classed as follows: (a) Glabrous Riparias with 

 entire large leaves, dull; (a') with thin leaves, most of the 

 forms of the north belong to this subdivision ; they are some- 

 times very vigorous, but their trunk is of inferior size; 

 (a") with thick leaves, the most vigorous and the best grafting- 



