Plants forming dense, extensive colonies, 1-3 dm; twigs of current season green to glaucous, ± angled, glabrous or hairy. Leaves deciduous; blade dark to pale green or glaucous, elliptic to narrowly elliptic, 15-41 × (5-)6-16(-20) mm, margins usually sharply, uniformly serrate (serrations sometimes minute, tipped with stipitate gland), surfaces glabrous or hairy, especially along abaxial midvein, eglandular abaxially. Flowers: calyx green, glaucous, glabrous; corolla usually white, cylindric to urceolate, 4-6 mm; filaments ciliate; (tubules with introrse, elongate pores). Berries black or blue, rarely white, 3-12 mm diam., glabrous. Seeds (3-)10-15(-20), ca. 1.2 mm. 2n = 48. Flowering spring-early summer. Headlands, high moors, dry, sandy areas, peaty barrens, rocky outcroppings, pine barrens, oak parklands, regeneration forests, abandoned pastures and bogs; 0-1900 m; St. Pierre and Miquelon; Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que.; Conn., Del., Ill., Ind., Iowa, Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Vt., Va., W.Va., Wis. Vaccinium angustifolium is extensively harvested from cultivated and wild plants in New England (especially Maine) and in Quebec and the Canadian Maritime Provinces.