Vitis labrusca (Cultivated)

Vitis labrusca L., Sp. Pl. 203 1753 (syn: Vitis blanda Rafin.; Vitis bracteata Rafin.; Vitis cana Rafin.; Vitis canina Rafin.; Vitis catawba Hort. ex C. Koch; Vitis ciliata Rafin.; Vitis digitata Rafin.; Vitis ferruginea Rafin.; Vitis labrusca var. subedentata Fernald; Vitis labruscana L. H. Bailey; Vitis labruscoides Muhl. & Rafin.; Vitis latifolia Rafin.; Vitis luteola Rafin.; Vitis obliqua Rafin.; Vitis obovata Rafin.; Vitis occidentalis Bartram ex le Conte; Vitis palmata Le Conte; Vitis prolifera Rafin.; Vitis rugosa Rafin.; Vitis sylvestris Bartram ex le Conte; Vitis taurina Walter; Vitis tenuifolia Le Conte; Vitis vulgaris Bartr.; Vitis vulpina Bartram ex le Conte) as per Catalogue of Life;          

USA (Alabama, Connecticut, District of Columbia, Delaware, Georgia, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Utah, Virginia, Vermont, Wisconsin, West Virginia), Canada (New Brunswick, Nova Scotia, Ontario), Europe (I), India (c), Vietnam (I), Madeira (I), Georgia [Caucasus] (I), Tajikistan (I), Uzbekistan (I) as per Catalogue of Life;  


Vitis
× labruscana is a subgroup of grapes originating from a hybridization of Vitis labrusca and other species, most commonly Vitis vinifera. Popular examples include Concord and Niagara grapes, which comprise nearly all grapes processed for juice or jelly in the United States. Such cultivars are frequently referred to as "labrusca", however many are as little as half Vitis labrusca in their pedigree. Another common term, arguably more accurate, is "labrusca-type". These varieties do in fact possess many of the traits of Vitis labrusca, frequently including slipskin fruit, strong "foxy" flavor/odor, and large leaves with lighter colored and pubescent undersides. Most are self-fertile, unlike wild Vitis labrusca.
For much of the history of American viticulture, such varieties made up the bulk of production, particularly outside of California. In more recent years, however, the introduction of chemical pesticides and the development of rootstocks able to tolerate phylloxera have reduced their importance considerably in favor Vitis vinifera. Nonetheless, such cultivars, particularly Concord, remain a significant and vital part of the North American and Japanese grape industries.
(from Wikipedia on 6.5.16)


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Vitis x labruscana from Jammu GSMAY01 : 2 posts by 2 authors. Attachments (2)
Vitis labruscana Bailey, Gentes Herb. 1: 126 1923
Cultivated grape often considered under V. labrusca (which has few flowered globose flower clusters and few smaller fruits), with several cultivars, differentiated from Vitis vinifera by leaves being white tomentose on under surface, tendrils present on each joint (absent on every third joint in Vitis vinifera) and globose berries (oblong in V. vinifera).  
Thanks, ..., for beautiful posting with details & keys.
 
 
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Vitis vinifera L. : 3 posts by 2 authors. Attachments (7)- around 800 kb each. 
Location:  Gyanerswor, Kathmandu, Nepal  
Date: 16 April 2018
Altitude: 4400 ft.
Habit: Cultivated
Nepali Name : अंगुर  Angur 

The leaves are white tomentose beneath, It could be Vitis labruscana 
Distributed as V. vinifera

You may be right ...!
 


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