336 Karl. M. Wiegand and Arthur J. Eames 



a. Corolla almost polypetalous, rotate, 4-parted ; plants trailing, evergreen. 



b. Leaves acute; stems not prolonged beyond the flowers and fruit; pedicels with 

 2 narrow colored bracts; lobes of the corolla 5-6 mm. long. 



6. V. Oxycoccus 

 b. Leaves obtuse; stems prolonged beyond the flowers and fruit; bracts broad 

 and herbaceous ; lobes of the corolla 6-10 mm. long. 7. V. macrocarpon 



1. V. stamineum L. Deerberry. Squaw Huckleberry. 



Dry sandy or gravelly open woods in noncalcareous soils, and on the leached- 

 out crests of cliffs; rather common. May-June. 



Common on the hills w., s., and e. of Ithaca, on the cliffs along the shores of 

 Cayuga Lake, and on the sandy soils n. of the lake ; absent in the McLean region 

 and on the clays and richer soils back from the lake shores. 



Mass. to Minn., southw. to Fla., Ky., and La. ; but unexpectedly infrequent or 

 rare on the Coastal Plain. 



2. V. pennsylvanicum Lam. Early Upland Blueberry. 



Distribution as in the preceding species or in more acid soils, rarely also in 

 swampy tracts; common. Apr. 25-May; fr. July. 



Newf. to Sask., southw. to Va., 111., and Wis., including the Coastal Plain. 



Dudley cites V . pennsylvanicum Lam., var. nigrum Wood, as occurring on the 

 North Pinnacle, Caroline. A specimen in the C. U. Herbarium from that locality, 

 presumably collected by Dudley (July 19, 1882) and labeled in his handwriting "Vac- 

 cinium pennsylvanicum (Lam.)- — fruit (black)," is a black-fruited form of the 

 ordinary V. pennsylvanicum, not var. nigrum Wood as that variety is now under- 

 stood. 



3. V. vacillans Kalm. Late Upland Blueberry, 



Distribution as in the preceding species, but occasionally in slightly calcareous 

 soils; common. May; fr. Aug. 



In addition to its normal occurrence in noncalcareous soils, this species has been 

 found near Chicago Bog, an unexpected station. 



N. S. to Mich., southw. to Ga., Tenn., and Kans., including the Coastal Plain. 



4. V, canadense Kalm. Sour-top or Velvet-leaf Blueberry. 



In peat bogs, in dry sandy acid soils, or on noncalcareous rocky ciests; scarce. 

 Tune. 



McLean Bogs (DA); Malloryville Bog (DA); Lake Como (Locke Pond, D.) ; 

 YVoodwardia Bog ; dry rocky crests of Taughannock Gorge above the falls, 

 1904 (E. M. Cipprrlx & K. M. W.) ; rocky crest of Shurger Glen (L. H. Mac- 

 Daniels & K. M. IV.). 



Lab. to Man., southw. in the mts. to Va. and 111. 



Flowers generally smaller than in V. pennsylvanicum. 



5. V. corymbosum L. Swamp, Tall, or High Blueberry. 



In or near acid or calcareous bogs, rarely in dry sandy acid soil; frequent. May 

 25-June. 



Headwaters Swamp; Michigan Hollow; Key Hill swamp; swamp n. of upper 

 Enfield Glen ; South Hill Marsh ; Ellis Hollow ; e. of Dryden Lake ; Woodwardia 

 Bog; McLean Bogs; Beaver Brook; Junius ponds; and elsewhere. 



N. S. to Minn., southw. to Va. and La., chiefly eastw., including the Coastal Plain. 



Dudley, in the Cayuga Flora, lists V. corymbosum. var. atrococcum Gray, from 

 Larch Meadow and the Dryden marshes. The identity of Dudley's plants is uncertain. 

 It has not been possible to recognize V. atrococcum as a distinct species, or even 

 as a variety, in central N. Y. V. corymbosum as here understood varies greatly as to 



