This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Vaccinium ovalifolium J. E. Smith in Rees' Cyclop;
36: No. 2. 1817.
A straggling branched shrub, 3°-12° high, the branches slender; twigs glabrous, jointed, sharply angled. Leaves oval, or elliptic, short-petioled, glabrous on both sides, green above, pale and glaucous beneath, rounded at both ends, or somewhat narrowed at the base, thin, sometimes mucronulate, entire or very nearly so, 1'-2' long; flowers commonly solitary in the axils, on rather short recurved pedicels; calyx-limb slightly toothed; corolla ovoid; stamens 10; berry blue with a bloom, 4"-5" in diameter.
Woods, Quebec to Michigan, Oregon and Alaska. Also in Japan. June-July. Fruit ripe July-Aug.
A branching shrub, 2°-8° high, with glabrous green warty twigs. Leaves oval, ovate or oblong, rather thin when mature, acute or acuminate, narrowed or rounded at the base, short-petioled, glabrous and light green above, pale and slightly glaucous beneath, serrulate, or nearly entire, 1' - 3' long; flowers several or numerous in the clusters, about equalling their slender pedicels; corolla oblong-cylindric to urceolate, slightly constricted at the throat, greenish-pink, 2"-2 1/2" long, 1 1/2"-2" thick; berry blue, 4"-6" in diameter, delicious.
Vaccinium corymbosum L. Sp. Pl. 350. 1753. V. amoenum Ait. Hort. Kew. 2: 12. 1789.
A shrub, 6°-15° high, the twigs terete, minutely warty, greenish-brown, puberulent, or glabrous. Leaves oval or oblong, mostly acute at each end, entire or serrulate, sometimes' ciliate, green and glabrous above, paler and often pubescent at least on the veins beneath, short-petioled, 1'-3' long, 1/2'-1 1/2' wide; flowers in short racemes, appearing with the leaves, equalling or longer than their pedicels; bracts oblong or oval, deciduous; calyx 5-lobed; corolla cylindric, or slightly constricted at the throat, white or faintly pink, 3"-6" long, 1 1/2"-3" thick, 5-toothed (rarely 5-lobed); stamens 10; berry blue with a bloom, 3"-4" in diameter, pleasantly acid.
In swamps, thickets and woods, Maine to Virginia, Quebec, Minnesota and Louisiana, apparently erroneously recorded from farther north. May-June. Fruit ripe July-Aug. Great whortleberry. Seedy dewberry Swamp-blueberry. The late market blueberry.