702 



VACCINIACEAE. 



Vol. II. 



10. Vaccinium vacillans Kalm. Low Blueberry. Blue Huckleberry. Fig. 3268. 



V. vacillans Kalm; Torr. FI. N. Y. i : 444. 1843. 



A stiff branching shrub, 6-4'' high, with 

 glabrous or sometimes pubescent, yellowish- 

 green warty branches and twigs. Leaves obo- 

 vate, oval, or broadly oblong, acute or obtuse 

 and usually mucronulate, narrowed or rounded 

 at the base, firm, glabrous on both sides, or 

 pubescent beneath, entire, or sparingly serru- 

 late, pale, glaucous and finely reticulate-veined 

 beneath, i'-2i' long, 4'-ii' wide; flowers sev- 

 eral or few in the clusters which are sometimes 

 racemose on naked branches, longer than or 

 equalling their pedicels ; corolla oblong-cylin- 

 dric, somewhat constricted at the throat, 

 greenish-pink, 2"-3" long, ii"-2" thick; berry 

 blue with a bloom, sweet, 2"-3i" in diameter. 



In dry soil. New Hampshire to Ontario and 

 Michigan, south to Georgia, Tennessee and Kan- 

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



II. Vaccinium nigrum (Wood) Britton. 

 Low Black Blueberry. Fig. 3269. 



I'accinium pennsylvanicum var. nigrum Wood, Bot. & 



Flor. 199. 1873. 

 V. nigrum Britton, Mem. Torr. Club 5: 252. 1894. 



Similar to V. angustifolium and often growing 

 with it, 6-12' high, the twigs glabrous. Leaves 

 oblong, oblanceolate or obovate, acute at the apex, 

 narrowed or rounded at the base, finely serrulate, 

 very nearly sessile, i'-i' long, 3"-6" wide, glabrous 

 on both sides, green above, pale and glaucous be- 

 neath ; flowers few in the clusters, longer than their 

 pedicels; corolla globose-ovoid, very little con- 

 stricted at the throat, white or cream color, about 2" 

 long, li" thick; berry black, without bloom, about 

 3" in diameter. 



In dry rocky soil, New Brunswick to New Jersey, 

 Pennsylvania and Michigan. May. Fruit ripe in July. 



12. Vaccinium atrococcum (A. Gray) Heller. Black Blueberry. Fig. 3270. 



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



151. 1824. Not Michx. 1803. 

 Vaccinium corymbosum var. atrococcum A. Gray, 



Man. Ed. 2, 250. 1856. 

 V. atrococcum Heller, Bull. Torr. Club 21 : 24. 



1894. 



A branching shrub with shreddy bark, 3°-io° 

 high, closely resembling Vaccinium corym- 

 bosum, 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, mucronate, thick, 

 ii'-3' long, 4'-iV wide; flowers in short 

 racemes, appearing with the leaves, about the 

 length of their slender pedicels ; bracts and 

 bractlets caducous ; calyx S-lobed ; corolla 

 short-cylindric or ovoid, pink or greenish-red, 

 2"-3" long, about li" thick, 5-toothed, con- 

 stricted at throat ; berry black, without bloom, 

 sweet, 3"-s" in diameter. 



In swamps and wet woods. New Brunswick and 

 Ontario to New Jersey, Pennsylvania and Ala- 

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



