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a high temperature is reached in summer, especially in the 

 extreme south-west of Missouri, in Arkansas, Indian Terri- 

 tory, north-west of Louisiana, and north-east of Texas. We 

 will note that it is mostly found in the Rupestris region. 

 The V. Lincecumii generally grows in the red siliceous , 

 very deep and rich soils of river banks; on the hills, it only 

 lives in soils composed of siliceous or granitic pebbles, mixed 

 with reddish clay, constituting a dry medium, but always. 

 fairly fertile and compact. As a graft -bearer it is not 

 superior to the Rupestris for the above-mentioned soils, and 

 not superior to the Riparia for the rich deep soils, and, as 

 we have said, its resistance to phylloxera is inferior to that 

 of these two species. It is a species which succeeds even 

 less in calcareous soils than the Rupestris ; it has never been 

 found growing in such soils, even accidently, in America. 

 In France it only grows well in soils containing a small 

 amount of limestone, slightly compact and rich; in white 

 limestone soils it rapidly turns yellow. 



V. BICOLOR. 



V. Bicolor is a species intermediate in its character, be- 

 tween V. Lincecumii and V. ^Estivalis ; it only differs from 

 the latter in the smaller indentations of its leaves, which are 

 glaucous green and glabrous on the under-face, by its bunch 

 small andclose set, and above all by its small seeds (Fig.iS). 

 It is peculiar to the north-east of the United States, especially 

 in Michigan, Indiana, and New York state. It only grows 

 in soils derived from old formations, red siliceous and fertile 

 (Carboniferous, Silurian, Devonian, etc.). The pure forms of 

 this species, only recently imported into 

 France, have, even in good soils, a com- 

 paratively small development. Its resist- 

 ance to phylloxera has not yet been 

 ascerta ned, but seems equal to that of the Fig . l8 ._l Seed of 

 best ^Estivalis forms. This species does v - Bicolor. 

 not succeed in chalky soils and marl, as applies also to- 

 the latter. In a word, the V. Bicolor is of no practical 

 interest for reconstitution. 



V. ^ESTIVALIS. 



(a) Description. Stump vigorous, creeping habit, trunk 

 strong; wood of the year deep wine colour, with bloom at. 



