ERICACEAE. (HEATH FAMILY.) ■ 291 



* * Parts of the flower in fives: stamens 10: leaves membranaceous : flowers solitary 

 on short axillary peduncles, nodding. 



8. V. CSespitdsum, Michx. Dwarf (3' -5' high), tufted; leaves obovate, 

 narrowed at the base, smooth and shining, serrate; corolla oblong, slightly urn- 

 shaped ; berries blue. — Alpine region of the White Mountains of New Hamp- 

 shire ; and high northward. 



9. V. OValif61ilim, Smith. Straggling, 3° -10° high; leaves elliptical, 

 obtuse, nearly entire, pale, mostly glaucous beneath, smooth ; corolla ovoid; berries 

 blue. — Peat-bogs, Keweenaw Co., Lake Superior, Dr. Robbins (and far west- 

 ward). May. 



10. V. myrtilloides, Hook. More erect, 1°- 4° high; branchlets some- 

 what angled ; leaves mostly ovate and acute or pointed, sharply and closely serrulate, 

 bright green, nearly smooth ; border of the calyx almost entire ; corolla depressed- 

 globular, rather large ; berries large, black, rather acid. — Woods and bluffs, 

 Keweenaw Co., Lake Superior, Dr. Robbins. (Lake Huron, Dr. Todd; and 

 northwestward.) May, June. — Pedicels 3" - 6" long, drooping in flower, 

 erect in fruit. 



§ 6. CYANOC6CCUS. Ovary more or less completely 10-celled by false partitions : 

 corolla oblong-cylindrical or slightly urn-shaped, 5 -toothed : anthers 10, awnless: 

 filaments hairy: berries blue or black with a bloom (sweet) : flowers in clusters or 

 vtry short racemes from scaly buds separate from and rather preceding the leaves, 

 on short pedicels, appearing in early spring. (Leaves deciduous in the Northern 

 species or proper Blueberries. ) 



11. V. Pennsylvanieum, Lam. (Dwarf Blueberry.) Dwarf (6'- 

 15' high), smooth ; leaves lanceolate or oblong, distinctly serrulate with bristle-pointed 

 teeth, smooth and shining both sides (or sometimes downy on the midrib under- 

 neath) ; corolla short, cylindrical-bell-shaped. — Var axgustif6lium is a high 

 mountain or boreal form, 3' -6' high, with narrower lanceolate leaves. (V. an- 

 gustifolium, Ait. ) — Dry hills and woods : common from Pennsylvania and N. 

 Illinois far northward. — Branches green, angled, warty. Berries abundant, 

 large and sweet, ripening early in July : the earliest blueberry or blue huckle- 

 berry in the market. 



12. V. Canadense, Kalm. (Canada Blueberry.) Low (l°-2° high) ; 

 leaves oblong-lanceolate or elliptical, entire, downy both sides, as well as the crowded 

 branchlets; corolla shorter: otherwise as the last, into which it seems to pass. 

 — Swamps or moist woods, Maine to Wisconsin, and northward. 



13. V. vacillans, Solander. (Low Blueberry.) Low (l°-2i° high), 

 glabrous ; leaves obovate or oval, very pale or dull, glaucous, at least underneath, 

 minutely ciliolate-serrulate or entire ; corolla between bell-shaped and cylindra- 

 ceous, the mouth somewhat contracted. — Dry woodlands, especially in sandy 

 soil, New -England to Virginia and N. Illinois. — Branches yellowish-green. 

 Berries ripening later than those of No. 11. 



14. V. corymbdsum, L. (Common or Swamp-Blueberry.) Tall 

 (5° - 10° high) ; leaves ovate, oval, oblong, or elliptical-lanceolate; corolla varying 

 from turgid-ovate and cylindrical-urn-shaped to oblong-cylindrical. — Swamps 

 and low thickets: everywhere common, except south westward. — This yields 



