This section is from the "American Horticultural Manual Vol2" book, by J. L. Budd. Also available from Amazon American Horticultural Manual, Part Two.
Medium to large, regular, oblong, with ends flattened; cavity broad and deep; suture usually broad and deep; color purplish red with light green patches in the shade. Flesh firm; quality much like Lombard, and it ripens at the same time; but the tree is somewhat hardier than Lombard, and less subject to rot of fruit. Domestica.
Large, purple, and best in quality. A large prune originating in Washington and now grown in Texas and eastward to New Jersey and Maryland. Domestica.
Medium to large, ovate, flattened at sides; color dark purple overlaid with dark-blue bloom; suture in broad deep valley, passing the apex and extending to an elevated point near the stem; stalk three-fourths to one inch long, very stout, inserted on a raised point. Flesh greenish yellow, firm, juicy, rich; quality best; freestone. Tree a low-spreading grower and hardy in trying climates. From Russia.
Large to very large, oval; color pinkish red with bluish bloom and many whitish and bluish dots; stem short, pubescent, inserted in abrupt, quite deep cavity; suture shallow. Flesh yellow, rich; quality good to very good; pit free. It has been so long known as Victoria that a change to "Sharp," as now suggested, will be difficult to establish.
Iarge, egg-shaped, but enlarged and rounded at lower end; suture distinct; stalk three-quarters to one inch long, stout, inserted in narrow deep cavity. Mesh yellow, close-texturcd, tender, melting; very good to best; freestone. Russia.
Wangenheim. Medium, ovate; color dark blue with heavy blue bloom; stem slender, short, in shallow cavity; suture obscure or faint. Flesh yellow, firm, sweet; quality good; freestone. (Grown commercially east of the lakes and in the South. Domestica.
 
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