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..
V. caesariense Mackenzie, Torreya 10: 230. 1910.
A quite glabrous, much-branched shrub, 3°-10° high, the twigs green and warty. Leaves ovate to elliptic-lanceolate, very short-petioled, entire-margined, acute or acutish at the apex, narrowed or somewhat rounded at the base, dull green above, much paler beneath, 3' long or less, about one-half grown at flowering time; racemes 6-12-flowered; pedicels about as long as the corolla; bracts ovate-oblong; calyx glaucous, its lobes broad, acute; corolla dull white, urceolate, 2"-3" long, 1 1/2"-2" thick; style slightly exserted; berries dark blue, with a bloom, 3 "-4" in diameter.
Bogs, Long Island, N. Y., and in the pine-barrens of New Jersey. May.
A low pubescent branching shrub, 6'-2° high. Leaves oblong, oblong-lanceolate or narrowly elliptic, pubescent, at least beneath, entire, acute at the apex, narrowed at the base, 1'-l 1/2' long, 4"-8" wide; flowers few in the clusters, which are sometimes numerous on naked branches, appearing with the leaves; pedicels usually shorter than the flowers; corolla oblong-campanulate, greenish-white, 2"-3" long and 1 1/2" thick; berry blue or bluish-black, with a bloom (rarely white), sweet, 2 1/2"-3" in diameter.
Vaccinium pennsylvanicum angustifolium A. Gray, Man. 261. 1848.
Vaccinium angustifolium Ait. Hort. Kew. 2: 11. 1789.
V. Dobbini Burnham, Am. Bot. 12: 8. 1907.
A low branching shrub, 6'-2° high, similar to the preceding species, but with green warty branches and usually nearly or quite glabrous throughout. Leaves oblong-elliptic or oblong-lanceolate, green and glabrous on both sides or slightly pubescent on the veins beneath, sharply serrulate, acute at both ends, 9"-18" long, 1"-6" wide; flowers few in the clusters, longer than the very short pedicels; corolla oblong-campanulate, slightly constricted at the throat, 2"-3 1/2" long, about \\" thick, white or pinkish; berry blue or nearly black, with a bloom, sometimes white, or reddish, very sweet, 3"-5" in diameter.
In dry, rocky or sandy soil, Newfoundland to Saskatchewan, Virginia, Illinois and Wisconsin. Strawberry-huckleberry. May-June. Fruit ripe June-July. The early market blueberry.