KRICACE.E. (lIEATII FAMILY.) 313 



6. V. vacillans, Solander. (Low Bmiekeuky.) Low (l-2J° hiffli), 

 glalrroitti, witli \ tllowisli-^reon hranohlota; leaves nhovate or oval, veri) pale or 

 dully iflaucuus, at least uiidoriieath, minutely ciliolate serrulate or entire ; co- 

 rolla between bell-sliajjed and cylindraeeons, the mouth somewhat contracted. 



— Dry places, especially in?findy soil, New En<;. to Mich, and Iowa, south to 

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



7. V. corymbdsum, L. (Common or Swamp-Bluebekry.) Tall (:■»- 

 10° high); leaves ovate, oval, oblong, or ellipticoNanceolate ; corolla varying 

 from turgid-ovate and cylindrical-urn-shaped tooblong-cylindrical, 3-4" long. 

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

 the common hlueherri/ or blue hurUeberri/ of the latter part of the season. Tiie 

 typical form has leaves with naked entire margins, and may be })ubescent or 

 glabrous (var. glaurl'm, Grai/, Man.) Numerous gradations unite the iol- 

 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. atrococcum, Gray. The most distinct form ; leaves entire, downy 

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

 black, without bloom. — New P^ng. to Penn. 



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

 toothed ; Jilaments glabrous; anthers 2-aicned on the back, included ; bern/ 

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

 together, appearing with or aJJer the leaves ; mostlg glabrous. 

 * Parts ofthejlower mostli/ in Jours; stamens 8. 



8. V. Uligin6sum, L. (Bog Bilberry.) Low and spreading (4' -2° 

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

 cent underneath; Howers 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 Jives ; stamens 10; leaves viembranaceous ; flowers 

 solitari) on short axillari/ peduncles, nodding. 



9. V. Caespitdsum, Michx. Dwarf (3 -C 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. cuNEiFoi.iuM, 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 mostli/ ovate and acute or pointed, sharply and closely 

 serrulate, bright green, nearly smooth; border of tiie calyx aluK s' entire; co- 

 rolla depressed-</lobular, rather large ; berries large, black, rather acid. — Damp 

 woods, shores of L. Superior, and northwestward. May, June. — Pedicels 3- 

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



