CEPAGES. 57 



Mustang had a fine development had the following percent- 

 age composition (analysis due to Chauzit): 



Clay . . . . .. 25.37 per cent. 



Sand . . . . . . 54 . 75 * 



Carbonate of lime .. 18.00 " 



This species, therefore; is not peculiar to calcareous soils, 

 and its hybrids, when they possess its characters in a high 

 degree which is often the case become easily yellow in 

 chalky soils. 



Further, the Mustang is the most difficult species to root 

 from cuttings more difficult even than the species originat- 

 ing from the warm regions of the United States. Its resist- 

 ance to phylloxera, which may be represented by the number 

 15, is not of the highest degree. Should varieties of this 

 species be found to root freely from cuttings, they would 

 require to be tried with care in compact soils, for which they 

 seem indicated; other American grafting-stocks are actually, 

 at least, superior, and better known from the point of view 

 of their adaptation. Let us note that the harsh taste of the 

 Mustang is constantly transmitted to the American or 

 Franco-American hybrids derived from it. The Mustang 

 resists cryptogamic diseases well on both leaves and fruit, 

 but is very liable to pourridie*. 



V. LINCECUMII. 



(a) Description. Stump very vigorous, creeping hrbit, 

 trunk strong; wood of year hazelnut colour; tendrils dis- 

 continous. Leaves (Fig. 16) very large, almost as wide as 

 long, orbicular, entire or lobed with deep sinuses; petiolar 

 sinus very deep, with tangent lips; limb thick and rugose; 

 upper-face deep green; under-face glaucous. Bunch medium, 

 berries medium, discoid, skin covered with bloom, deep red; 

 disagreeable taste. Seeds (Fig. 17) large, pear-shaped, beak 

 detached; chalaze wide, orbicular; raphe filiform. Roots 

 of medium strength, hard and long. 



(b) Varieties. The V. Lincecumii or V. Linsecomii, 

 AZstivalis with large berries, Post Oak, is represented by a 

 great number of types in its wild state. As it is fructiferous 

 and resistant to cryptogamic diseases, the Americans tried to 

 select it and create new varieties from seeds. H. Jaeger has 

 isolated over 100 pure forms of this species, and obtained 

 many hybrids between it and Rupestris. The Neosho 



