Vitis labrusca

 

According to wine historian Edward Hyams and wine expert Jancis Robinson, Vitis labrusca was probably the species seen by Leif Ericsson growing wild along the coast of Vinland in the 11th century. There is ample evidence that the labrusca was growing wild in North America before Europeans arrived. The vine was not officially identified and recorded until Carl Linnaeus and his peers started cataloging American vine species in the mid-18th century. In the 19th century, Vitis labrusca was among the American vines transported to Europe that were carrying the phylloxera louse that caused widespread devastation to the European vineyards planted with Vitis vinifera.^[3]

Also in the 19th century, Ephraim Bull of Concord, Massachusetts, cultivated seeds from wild labrusca vines to create the Concord grape which would become an important agricultural crop in the United States.^[3]

The majority of Vitis labrusca grape varieties are red, although white varieties such as Niagara and "pink-skinned" varieties such as Catawba have dark colored berries high in phenolic compounds that produced strongly flavored wines. As the berries near harvest and become fully ripe, they separate easily from the pedicel (berry stem). If the berry is squeezed gently between two fingers, the thick skin will slip easily off leaving the pulp intact as a ball. This trait gives Vitis labrusca the name of "slip skin" grapes. Another trait of labrusca that aids ampelographers in identification of vines and hybrid varieties descended from the species is the large, thick leaves of the vines that have a hairy underside with dense brown or white hairs.^[1]

Like many other American vine species, Vitis labrusca has some natural resistance to many grape diseases, including phylloxera. However, its resistance and grafting compatibility is not as high as that of other species, such as Vitis aestivalis, Vitis rupestris and Vitis berlandieri, and it is not often used for commercial rootstock.^[1] It is a robust plant, and in many states can be considered weedy or invasive.^[4]

 

Vitis labrusca is located along the eastern seaboard of North America from Nova Scotia down to Georgia and westward to the Mississippi River. Among American Viticultural Areas (AVA)s that produce wine from labrusca or hybrids derived from labrusca include Upper Mississippi Valley, Mississippi Delta, Ohio River Valley, Southeastern New England, Lake Erie as well as several AVAs in the states of New York, Virginia, Ohio and Michigan.^[5] In the Canadian Province of Ontario, the use of Vitis labrusca varieties is not permitted by the VQA regulatory and appellation system, except for Vidal, a hybrid grape varietal.^{[citation needed]}

Unlike vinifera, hybrids and Vitis labrusca varieties can better withstand the severe continental conditions of eastern North America with severely cold winters and hot, humid summers. (However, labrusca doesn't do quite as well as varieties like Vitis rotundifolia in the humidity of southeastern US). In fact, in areas of the United States where vinifera does flourish in the west, the conditions during the growing season are often too arid for labrusca vines.^[5]

According to University of California, Davis viticulture expert A. J. Winkler, outside of the vinifera Muscat family of grapes, Vitis labrusca varieties have the most pronounced aromas among wine grape varieties. The description of "foxy", not derived from the animal^{[citation needed]}, serves as a catch-all term to describe the unique, earthy and sweet muskiness that can be perceived in fresh Concord grapes as well as grape juice made from Concord and other labrusca varieties like Niagara. In the 1920s, scientists were able to isolate the aroma compound responsible for the "foxy" musk as methyl anthranilate.^[5]

• List of grape varieties
• Bangalore Blue

• Plants of the World Online: Vitis labrusca
• Flora of North America: Vitis labrusca