Narrative
Type = American Hybrid. Per Galet (see citation): [About V. labrusca Linnaeus] "Growing tip: felty, white with rose margin. Young leaves: yellowish, downy above, felty below. Leaf: cuneiform (Concord 136-2-34) or truncate (Isabella 146-3-57), more rarely orbicular (North Carolina 035-2-57); entire (Isabella 10, Concord 11) to five-lobed (Creveling 41); bullate, sometimes crimped around the petiolar sinus; lower surface felty usually with large veins, covered with rust-colored hairs in a meshlike pattern; teeth medium or large, convex, generally shallow; petioles short, cobwebby. Shoot: ribbed, downy at tip, often covered with stiff, dark hairs making the surface rough to touch; tendrils continuous or sub-continuous. Flower cluster: medium, perfect or female flowers on all types introduced to Europe although T.V. Munson notes the existance of male vines. Cluster: medium, cylindrical; berries round, black blue, red, or white depending on the cultivar, medium size (10 to 15 mm), thick skin, slip-skin pulp, not very juicy; foxy flavor (methyl anthranilate), popular 'grape' flavor in the United States which Europeans find strange. Seeds: very large 8 x 5 mm (the largest in the genus Vitis), chocolate brown with clear yellow indentations which are long and narrow of medium depth; rudimentary or nonexistant chalaza, deep circular depression (.56) and groove; no raphe. Growth habit: vigorous, climbing, in well-lighted areas. [ ... ] Although Labrusca roots and grafts extremely well, the Europeans found its resistance to both phylloxera (4/20) and lime (4%) insufficient for use as a rootstock. In the Eastern United States, it is generally planted on its own roots. The leaves do not carry phylloxera galls. While having good resistance to powdery mildew, Labrusca varieties are susceptible in varying degrees to downy mildew and black rot and have a low tolerance to Pierce's disease. Labrusca has a good resistance to cold."