Orwigsburg. (Lab. Vin.) Black Palestine; Schuylkill. Found growing near Orwigsburg, Schuylkill County, Pennsylvania, by Dr. W. E. Hulings of Philadelphia. Generally supposed to be a hybrid between a Vinifera and some native species, probably Labrusca; said to be productive, hardy, subject to mildew; berries round, small, white; juicy, sweet; good.
Osage. (Lab. Vin.) A black seedling of Concord; from John Burr, of Kansas. Vigorous, usually hardy and healthy, medium to very productive; flowers sterile; stamens reflexed; tendrils continuous; clusters variable in size, usually short, shouldered, compact; berries large, distinctly flattened to sometimes roundish; dull black with blue bloom, shatter badly, not firm; flesh tough, foxy, sweet, good; of Concord type but less foxy; a week earlier than its parent.
Osceola. (Lab. Vin. Bourq.) A seedling of Standard; from Dr. J. Stayman. Vigorous, very hardy, healthy and productive; stamens upright; bunch medium to large, compact; berry large, white; skin thin, tough; pulp tender, sweet, rich, sprightly, vinous; very good; ripens with Jewel.
Osee. (Rip. Lab.) A white Riparia from John Burr, Leavenworth, Kansas; said to be a seedling of Grein Golden. Variable in vigor, very productive, hardy; bunch medium, short and thick, compact; berry white, very large; tender, very juicy, sprightly, sweet with a peculiar flavor; good only for wine; ripens before Concord.
Oskaloosa. (Bourq. Lab.) A Delaware seedling; from Dr. J. Stayman. Vigorous, hardy, healthy and productive; bunch medium, compact; berry large, black with bloom; skin thick, tough; pulp tender, rich, sweet, sprightly, juicy, vinous; very good; very late.
Osmond. (Rip.) Noted by Downing, 1869, as a seedling of Franklin from O. T. Hobbs, Randolph, Pennsylvania. Bunch small; berry small, round, black, blue bloom; flesh vinous, harsh.
Oswego. (Lab.) Noted in Bushberg Catalogue, 1894; origin unknown, from Dr. J. Stayman of Leavenworth, Kansas. Vigorous, hardy and productive; bunch and berry very large, handsome, resembling Concord in color; little pulp and with native aroma; ripens with Concord.
Otoe. Mentioned in the United States Department of Agriculture Report, 1863, as one of the varieties under trial in the government experimental garden.
Ouachita. (Aest.) A wild grape found on the plantation of Dr. G. W. Lawrence near Midland on the Ouachita River, Hot Springs County, Arkansas. Hardy and productive with long, compact bunches; one time popular in France for wine-making.
Owego. From John Burr. Vigorous, hardy, healthy and productive; bunches medium, compact; berry very large, red; tender, juicy, sprightly and vinous; best quality.