52 AMERICAN VINES. 



proportions and development on the banks of rivers, in brown 

 alluvial, loose, very deep and fresh soils, or in pebbly soils 

 containing only felspar, granitic, or siliceous pebbles. The 

 forms with thick leaves, indented and tomentose (Girdiana 

 group), live in siliceous soils, often in pure dry unfertile 

 sands 



In the north of California (especially the 



counties of Napa and Sonoma) the V. 



California is found growing in calcareous 



soils, and in reddish or blackish rather 

 Pig. ro. Seed of calcareous marl. In these soils the wild 



forms of the species become rapidly 

 chloratic. The Californians who tried to propagate it as 

 grafting stock have been compelled to limit it to sandy, rich 

 and fresh alluvials. This species is almost as sensitive to 

 chlorosis as the V. Labrusca In chalky soils of the 

 Charentes, it rapidly becomes yellow, and, what is more, its 

 resistance to phylloxera is not even equal to that of the V. 

 Labrusca, and may be expressed by the number 4. 



It is on account of this feeble resistance that it has never 

 been cultivated in Europe, where it only exists in collections. 

 It roots freely from cuttings, and knits well with V. Vini- 

 fera; but its leaves are very liable to cryptogamic diseases 



V. CARIB^A. * 



This species is of no practical interest; it lives in tropical 

 America, in the West Indies, the warm regions of Mexico, 

 etc. It has frequently been imported into France and cul- 

 tivated in collections, but has never thrived, and soon 

 disappeared, owing to the unsuitable climate. Its value as 

 far as adaptation and resistance to phylloxera are concerned 

 has never been studied. 



V. CORIACEA. 



The V. Coriacea is like the V. Caribaea, of no practical 

 cultural value ; it is limited to Florida, where it grows in the 

 same soils as the V. Munsoniana, in the very rich, generally 

 swamp soils, of the Eocene and Quaternary period. It was 

 introduced into France in 1887, but grows badly in rather 

 calcareous soils, without, however, becoming yellow. Its 

 resistance to phylloxera has not yet been ascertained, but it 

 does not seem to be superior to that of the Mustang, which 



