This section is from the "American Horticultural Manual Vol2" book, by J. L. Budd. Also available from Amazon American Horticultural Manual, Part Two.
Large, oval; color purple with blue bloom; stem one inch long in small narrow cavity. Flesh greenish yellow, quality very good: clingstone. Season, earlier than Bradshaw, of which it is a seedling.
Medium,long oval; sides very unequal, and elongated at the top; suture very distinct; color purple with heavy blue bloom, stalk three-quarters of an inch long, curved, slender, inserted at top of fruit without cavity. Flesh firm, greenish yellow, sweet, and pleasant when fully ripe; pit free. As with the Damson this variety has varied when locally grown from pits in Europe and America. Domestica.
Giant. (Giant Prune). - Very large, dark crimson on yellow ground. Flesh yellow, flavor good. This very large prune has not met expectations as a drying fruit, but it is considerably grown for market on the west coast and in the South. Domestica.
Large, oval, slightly irregular at apex; suture distinct in shallow depression that extends beyond the apex; color dark purple with thin blue bloom; stalk three-quarters to one inch long, stout, in narrow deep cavity. Flesh greenish yellow, juicy, sweet, very good; pit free. Tree very hardy, upright, with peculiar glossy dark green leaves. Domestica. Originated in Canada.
Large to very large, oval, with short neck and unequal sides; color golden yellow with numerous yellow dots; bloom also yellow; stalk quite long, stout, in shallow abrupt cavity; suture a valley extending beyond the apex. Flesh meaty, quality very good; cling. Popular where the tree proves hardy nearly across the continent. Domestica.

Large, long oval; color creamy yellow with numerous dots; bloom grayish and thin; stalk short and stout inserted in small abrupt cavity; suture shallow. Flesh yellow, firm; quality fair to good. Only grown on the west coast, commercially. Domestica. Oregon.
Medium to large, roundish to oval; color red or purplish with blue bloom and yellowish dots; stem short, stout, with show of pubescence, inserted in medium regular cavity; suture shallow. Flesh greenish yellow, quality fair; pit free. Grown largely for kitchen and market. Domestica.

Grand Duke
Large to very large, oval or obovate; color dark blue with dark-blue bloom; stalk one inch long in narrow shallow cavity; suture quite deep. Flesh yellow, firm, quality good to very good; cling.
Season, late. Seems to be quite free from rot east of the lakes. Domestica.
Small, obovate; color green or yellowish green when mature; at the West usually marbled with red; suture not very distinct; stalk one-half to three-quarters of an inch long, slender, in very shallow cavity. Flesh pale green, melting, juicy, luscious, best in quality; pit free. In the prairie States this succeeds most perfectly top-worked on a hardy stock. Domestica.

Green Gage.
Large, roundish oval, narrowed at apex to small point; color purple with thick blue bloom; stalk rather long, slender, inserted in large deep cavity; suture obscure. Flesh pale yellow, rather coarse, juicy, sweet, but not rich. Used mainly for kitchen and market; nearly freestone. Domestica. New York.
 
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