220 ERICACEAE. 



Corolla cylindric or nearly so, twice or thrice as long as thick. 1. V. corymhosum. 

 Corolla urn-shaped, oblong or cylindric-oblong, once or twice 

 as long as thick. 

 Leaf-blades not glaucous beneath : twigs green. 



Berries black : leaf-blades entire or essentially so, 



pubescent beneath. 2. V. atrococcum. 



Berries glaucous : leaf-blades manifestly serrulate, gla- 

 brous or nearly so. 3. V. angustifolium. 

 Leaf-blades glaucous beneath : twigs yellowisli. 4. V. vaciUans. 



1. V. corymljosum L. Plant 1-4 m. tall, the twigs glabrous or nearly so : leaf- 

 blades oblong to elliptic, 2.5-8 cm. long, entire, pubescent on or near the veins 

 beneath: corolla white or pale-pink, cylindric or narrowly ovoid, 8-12 mm. 

 long : berries 6-10 mm. in diameter, deep-blue and glaucous. — Common, in 

 moist thickets. — Spr. — High-blueberry. Swamp-blueberry. 



2. V. atrococcum (A. Gray) Heller. Plant 0.4-4 m. tall, the twigs finely 

 pubescent: leaf-blades oval to elliptic, or sometimes slightly broadest above 

 the middle, 2-7 cm. long, entire, dark-green above, pubescent beneath: corolla 

 yellowish or greenish-white, and sometimes red-tinged, ovoid-campanulate, 

 4-8 mm. long : berries 6-8 mm. in diameter, not glaucous. — Common, in moist 

 thickets. — Spr. — Black high-blueberry. 



3. V. angustifolium Ait. Plant mostly 2-3 dm. tall, the twigs minutely 

 pubescent: leaf -blades oblong or elliptic, varying to broadest above or below 

 the middle, 1.5-3.5 cm. long, acute at both ends, eiliate, pubescent on the mid- 

 rib or veins beneath: sepals deltoid: corolla white or pinkish, long-campanulate, 

 4-6 mm. long: berry globular, 6-10 mm. in diameter, glaucous, very sweet. 

 [F. pennsylvanicum Lam.] — M. Eare, in open woods, near Fruitville. — ■ 

 Limestones. — Spr. — Low-blueberry. Early-blueberry. Sweet-blueberry. 



4. V. vaciUans Kalm. Plant 1-12 dm. tall, the twigs glabrous: leaf -blades 



oval, broadly oblong, or sometimes ovate to obovate, 2-5 cm. long, more or less 

 distinctly serrulate, glabrous beneath: corolla greenish-yellow, and sometimes 

 red-tinged, cylindric-oblong, 4-7 mm. long: berries 4-7 mm. in diameter, blue 

 and glaucous. — Common, in dry places. — Early sum. — Late sweet-blue- 

 berry. 



4. OXYCOCCUS Hill. Vines. Leaves persistent: blades entire. Flowers 

 solitary or several together on terminal peduncles. Sepals 4 or 5. Petals 

 4 or 5, pink or red, distinct. Stamens conspicuously exserted. Anthers termi- 

 nating in long tubes. Berry mainly globose, rarely elongate or depressed, red. 



1. O. macrocarpus (Ait.) Pers. Stems trailing and creeping, sometimes 1 m. 

 long: leaf -blades oblong, rarely varying to ovate or orbicular, 6-14 mm. long, 

 revolute: sepals fully as broad as long: petals lanceolate to oblong-lanceo- 

 late, 7-9 mm. long : berries 1-2 cm. in diameter, acid. — E. S. Rare, in wet 

 sandy soil. — Schists. — Sum. — Cranberry. 



Order PRIMULALES. 



Herbs, shrubs, trees, or vines. Leaves alternate or opposite, some- 

 times all basal. Flowers perfect or polygamo-dioecious, variously disposed. 

 Calyx of 2-several partially united sepals. Corolla of 2-several distinct or 

 partially united petals. Androecium of as many stamens as there are 

 sepals or petals, sometimes accompanied by staminodia. Gynoecium of 

 4-6 united carpels, or rarely more. Fruit capsular or drupaceous, or 

 rarely an achene or a utricle. 



