VACCINIACEAE 891 



twice as many stamens as there are corolla-lobes. Filaments usually flattened, 

 epigynous or adnate to the base of the corolla. Anthers 2-celled, attached 

 by the back, sometimes 2-awned. Gynoecium compound. Ovary 2-10 celled, 

 inferior, crowned with the epigynous disk. Styles united. Stigmas simple or 

 minutely 4-5-toothed. Ovules anatropous, solitary or several in each cavity. 

 Fruit a berry or drupe, pulpy. Seeds or nutlets 1-several. Testa bony. En- 

 dosperm fleshy. Embryo central. 



Ovary 10-celled : fruit a berry -like drupe with 10 nutlets. 1. GAYLUSSACIA. 



Ovary 4-5-celled : fruit a many-seeded berry. 

 Petals more or less united. 



Petals united to near their tips into a variously shaped corolla. 



Upright shrubs or trees : ovary wholly inferior : berries variously colored. 

 Corolla campanulate. 



Stamens included : hypanthium jointed to the pedicel. 2. BATODENDRON. 



Stamens exserted : hypanthium continuous with the pedicel. 3. POLYCODIUM. 



Corolla globose, ovoid, urn-shaped to cylindric. 4. VACCINIUM. 



Creeping shrubby plants : ovary half-inferior : berries white, acute. 5. CHIOGENES. 



Petals united only near the base, the lobes curled back. 6. HUGERIA. 



Petals distinct. 7. OXYCOOCUS. 



1. GAYLUSSACIA H.B.K. 



Often evergreen shrubs, with erect or underground stems. Leaves alternate : blades 

 mostly entire, usually glandular. Flowers varying from white to red, in axillary drooping 

 racemes. Sepals 5. Corolla campanulate to tubular-conic, terete or 5-angled : lobes 5, 

 erect or reflexed. Stamens 10, usually included : filaments distinct, more or less winged : 

 anther-sacs prolonged into tubes. Disk ring-like or swollen. Ovary 10-celled : style 

 often exserted. Ovules solitary in each cavity, pendulous. Drupe with a 10-celled stone, 

 the 10 nutlets bony or horny. Seeds solitary, flattened. Testa very thin. HUCKLEBERRY. 

 The plants flower in the spring and mature their fruit in the summer. 



Corolla campanulate or globose-campanulate : leaves destitute of sticky resin. 

 Stems horizontal, underground, the branches erect. 

 Pubescence consisting of gland-tipped hairs. 



Twigs and racemes pubescent with short close-set hairs. 1. G. dumosa. 



Twigs and racemes bristly-hispid. 2. O. kirtella. 



Pubescence consisting of simple non-glandular hairs. 



Leaves glaucous, glabrous or nearly so. 3. O. nana. 



Leaves densely tomentose, especially beneath. 4. O. tomentosa. 



Stems erect, the branches spreading. 



Leaves firm ; blades obtuse or retuse : drupe glaucous. 5. G.frondosa. 



Leaves flaccid ; blades acuminate and apiculate : drupe black. 6. G. ursina 



Corolla conic : leaves sticky with a resinous secretion. 7. G. resinosa. 



1. Gaylussacia dumosa (Andr. ) T. & G. A low shrub, 1-5 dm. tall, with under- 

 ground stems and erect solitary or tufted branches, the twigs, leaves and inflorescence glandu- 

 lar-pubescent. Leaf-blades leathery, oval, obovate or oblanceolate, rarely linear-lanceo- 

 late, 2-4 cm. long, apiculate at the apex, ciliate, short-petioled, deep green above, paler 

 beneath : calyx glandular, about 5 mm. broad : sepals triangular or triangular-ovate, acute, 

 about as long as the hypanthium : corolla campanulate, 5-6 mm. long, white or pink, 

 wax-like ; lobes broadly ovate, more or less recurved or revolute : filaments pubescent : 

 anthers longer than the filaments, prolonged into filiform tubes : drupes globose, black, 6-8 

 mm. in diameter, commonly somewhat pubescent. 



In sandy soil, Newfoundland and along the coast to New York, south to eastern Pennsylvania, 

 North Carolina, Florida and Louisiana. DWARF HUCKLEBERRY. 



2. Gaylussacia hirt611a (Ait.) Klotzsch. A shrub, with underground stems, the 

 branches, twigs and inflorescence bristly-hispid, the tips of the hairs with minute glands. 

 Leaf-blades oblanceolate-spatulate or elliptic, 3-6 cm. long, apiculate, glandular-ciliate, 

 sparingly hispid above, short-petioled : racemes many-flowered : calyx hispid, 6 mm. 

 broad : sepals triangular, rather acuminate, about as long as the hypanthium : corolla 

 broadly campanulate, 7-8 mm. long ; lobes broader than long, the tips recurved, the edges 

 revolute : filaments pubescent : anthers longer than the filaments, prolonged into filiform 

 tubes : drupes not seen. [G. dumosa var. hirtella A. Gray.] 



In sand, Florida to Louisiana. 



3. Gaylussacia nana (A. Gray) Small. A low glaucous shrub 1-4 dm. tall, spread- 

 ing by underground stems. Leaf-blades leathery, elliptic, obovate or nearly spatulate, 

 2-3 cm. long, obtuse or minutely apiculate at the apex, glaucous on both sides, becoming 

 bright green above, prominently rugose and sprinkled with amber-colored resin beneath, 

 short-petioled : racemes few-flowered : pedicels slender, puberulent when young : calyx 



