578 



VACCINIACEAE. 



[VOL. II. 



7. Vaccinium atrococcum (A. Gray) Heller. Black Blueberry. (Fig. 2789.) 



Vaccinium disomorphum Brgel. Fl. Bost. Ed. 2, 

 151. 1824. Not Michx. 1803. 



Vaccinium corymbosum var. atrococcum A. 

 Gray, Man. Ed. 5, 292. 1867. 



V.atrococcum Heller,Bull.Torr.Club,ai:24. 1894. 



A branching shrub with shreddy bark, 

 3-io high, similar to the two preceding 

 species, the branches green, minutely warty, 

 the young twigs pubescent. Leaves oval or 

 oblong, dark green above, light green and 

 densely pubescent beneath even when old, 

 entire, usually acute at both ends, mucron- 

 ate, thick, 1%'-$' long, yi'-i%' wide; flow- 

 ers in short racemes, appearing with the 

 leaves, about the length of their slender pedi- 

 cels; bracts and bractlcts caducous; calyx 5- 

 lobed; corolla short-cylindric or ovoid, pink 

 or red, *"-$" long, about i#" thick, 5- 

 toothed, constricted at throat; berry black, 

 without bloom, sweet, 3"-$" in diameter. 



In swamps and wet woods, New Brunswick 

 and Ontario to New Jersey and Pennsylvania. 

 May-June. Fruit ripe July-Aug. 



8. Vaccinium Canadense Richards. 

 Canada Blueberry. (Fig. 2790.) 



V. Canadense Richards. App. Frank. Journ. a, 12. 1823. 

 A low pubescent branching shrub, 6 / -2 high. 

 Leaves oblong, oblong-lanceolate or narrowly ellip- 

 tic, pubescent, at least beneath, entire, acute at 

 the apex, narrowed at the base, I'-iJ^'long, 4"-6" 

 wide; flowers few in the clusters, which an some- 

 times numerous on naked branches, appearing with 

 the leaves; pedicels usually shorter than the flow- 

 ers; corolla oblong-campanulate, greenish white, 

 about 2" long and \%" thick; berry blue with a 

 bloom (rarely white), sweet, 2ji"-3" in diameter. 



In moist places, Labrador to the Northwest Territory, 

 south in the mountains to Virginia, and to Illinois and 

 Michigan. May-June. Fruit ripe July-Aug. 



9. Vaccinium Pennsylvanicum Lam. 

 Dwarf, Sugar or Low-bush Blue- 

 berry. (Fig. 2791.) 



V. Pennsylvanicum I^am. Encycl. i: 74. 1783. 



A low branching shrub, 6'-2 high, similar to 

 the preceding species, but with green warty 

 branches and nearly or quite glabrous through- 

 out. Leaves oblong or oblong-lanceolate, green 

 and glabrous on both sides or slightly pubescent 

 on the veins beneath, sharply serrulate, acute at 

 both ends, 9 // -i8 // long, 3 // -6 // wide; flowers 

 few in the clusters, longer than the very short 

 pedicels; corolla oblong-campanulate, slightly 

 constricted at the throat, 2"-2^" long, about 

 i}4" thick, white or pinkish; berry blue with'a 

 bloom, very sweet, 3 // -5 // in diameter. 

 In dry, rocky or sandy soil, Newfoundland to the Northwest Territory, south to southern New 

 Jersey, Illinois and Michigan. May-June. Fruit ripe June-July. The early market blueberry. 



Vaccinium Pennsylvanicum angustifolium (Ait.) A. Gray, Man. 261. 1848. 

 Vaccinium angustifolium Ait. Hort. Kew. 2: n. 1789. 



Leaves narrower, i"-iK" wide. Summits of the White Mountains, and the Adirondacks; 

 Quebec to the north shore of Lake Superior and arctic America. 



