ERICACEAE. (HEATH FAMILY.) 313 



6. V. vacillans, Solander. (Low BLUEBERBT.) Low (1-2^ high), 

 qlabrous, with yellowish-green branchlets ; leaves obovate or oval, very pale or 

 dull, glaucous, at least underneath, minutely ciliolate-serrulate or entire ; co- 

 rolla between bell-shaped and cylindraceous, the mouth somewhat contracted. 



Dry places, especially in sandy soil, New Eng. to Mich, and Iowa, south to 

 N. C. and Mo. Berries ripening later than those of n. 4. 



7. V. COrymb6sum, 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, 3 - 4" long. 

 Swamps and low thickets, throughout our range and southward. This yields 

 the common blueberry or blue huckleberry of the latter part of the season. The 

 typical form has leaves with naked entire margins, and may be pubescent or 

 glabrous (var. GLABRUM, Gray, Man.) Numerous gradations unite the fol- 

 lowing varieties : 



Var. amCBnum, Gray. Leaves bristly-ciliate, shining above, green both 

 sides, beneath somewhat pubescent on the veins. Middle Atlantic States. 



Var. pallidum, Gray. Leaves mostly glabrous, pale or whitish, glaucous 

 especially underneath, serrulate with bristly teeth. Common in the Alle- 

 ghanies southward, mostly on the higher ridges. 



Var. atroc6ccum, Gray. The most distinct form ; leaves entire, downy 

 or woolly underneath even when old, as also the branchlets ; berries smaller, 

 black, without bloom. New Eng. to Penn. 



3. VACCINIUM proper. (BILBERRIES.) Corolla ovate to globular, 4- 5- 

 toothed ; filaments glabrous ; anthers 2-awned on the back, included ; berry 

 4-5-celled ; leaves deciduous ; flowers on drooping pedicels, solitary or few 

 together, appearing with or after the leaves ; mostly glabrous. 

 * Parts of the flower mostly in fours; stamens 8. 



8. V. uligin6sum, L. (Boa BILBERRY.) Low and spreading (4' -2 

 high), tufted ; leaves entire, dull, obovate or oblong, pale and slightly pubes- 

 cent underneath ; flowers single or 2 - 3 together from a scaly bud, almost 

 sessile; corolla short, urn-shaped ; berries black with a bloom, sweet. Alpine 

 tops of the high mountains of N. Eng. and N. Y., shore of L. Superior, and 

 northwestward. (Eu.) 



* # Parts of the flower in fives ; stamens 10; leaves membranaceous ; flowers 

 solitary on short axillary peduncles, nodding. 



9. V. CSespitdsum, Michx. Dwarf (3 - 6' high), tufted ; leaves obovate, 

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

 shaped ; berries blue. Alpine region of the White Mts., and high northward. 



Var. cuNEir6LiuM, Nutt;., is a foot high or less, bushy, with cuneate-spatu- 

 late leaves rounded at the apex, passing in one form to spatulate-lanceolate 

 and acute. Shores of L. Superior and westward. 



10. V. myrtilloides, Hook. More erect, 1-5 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 ; co- 

 rolla depressed-globular, rather large ; berries large, black, rather acid. Damp 

 woods, shores of L. Superior, and northwestward. May, June. Pedicel* 3 - 

 6" long, drooping in flower, erect in fruit. 



