114 AMERICAN VINES. 



IL ASIATIC SPECIES. 



The principal species of Asiatic vines are : 



V. COIGNETI^:, Pulliat; V. THUNBERGI, Siebold et Zucc. ^ 

 V. LANATA, Roxburg; V. PEDICELLATA, Lawson; V. 

 ROMANETI, Romanet du Caillaud; V. DAVIDI or SPINO- 

 VITIS DAVIDI, Romanet du Caillaud; V. AMURENSIS, Ru- 

 precht ; V. PAGNUCCII, Romanet du Caillaud. 



All these species have, from the point of view of their 

 adaptation and general characters, a great analogy with 

 V. Labrusca. We know that the Behring Strait, separating 

 Asia from America, is bordered in the two continents by 

 soils belonging to the same geological formation (Tertiary) ;. 

 the diffusion of the same species in the two continents may 

 have therefore taken place at a past epoch, and the actual 

 types may originate from a common origin. 



The Asiatic species are only slightly resistant to phyl- 

 loxera; the following are the figures expressing the resis- 

 tance of the three best known species: 



V. Coignetise . . . . . . . . 3 



V. Amurensis . . . . ... . . 2 



V. Thunbergi . . . . . . 1 



These species have grown well in France, when not de- 

 stroyed by phylloxera, in rich, mellow, deep, fresh soils. 

 They seem to require a moist atmosphere ; in dry years their 

 development appears to be checked, and their leaves fall 

 early. They resist chlorosis almost as well as V. Labrusca r 

 especially V. Thunbergi, V. Coignetiae, and V. Amurensis, 

 which is one of the most slender, having some of the 

 characters of V. Vinifera, but greater resistance in lime- 

 stone soils. These vines are evidently of no value whatever, 

 even in very cold and humid regions, for which the V. Coig- 

 netiae has been extolled. 



We fear that these conclusions cannot be applied to the 

 vines of Caplat resulting from Coignetise seedlings, and 

 which from the preliminary trials in propagation would 

 have given encouraging results in the extreme north 

 of France. The origin of these vines allows us, how- 

 ever, to assert & priori their non-resistance to phyl- 

 loxera. 



