154 ERICACEAE. 



1. Evergreen: leaves toothed: not resinous. G. brachycera. 

 Deciduous : leaves entire. 2. 



2. Glandular-pubescent : leaves green beneath. G. dumosa. 

 Not glandular-pubescent 3. 



3. Leaves sticky-resinous, not glaucous. 4. 



Leaves pubescent and glaucous beneath. G. frondosa. 



4. Fruit black, not glaucous. G. baccata. 

 Fruit blue, glaucous. G. baccata glaucocarpa. 

 Fruit white or pink. G. baccata leucocarpa. 



ARCTOSTAPHYLOS. Bearberry. Manzanita. 

 Evergreen or deciduous low shrubs (as here considered) 

 with flaking bark ; rather slender and angled twigs ; somewhat 

 3-sided homogeneous pith ; alternate somewhat raised crescent- 

 shaped leaf-scars with i bundle-trace ; no stipule-scars ; com- 

 pressed ovoid small solitary buds with 2-4 exposed scales ; 

 small simple entire (in some other species toothed) short-peti- 

 oled leaves ; small perfect pink or white urceolate gamopetalous 

 flowers in small racemes ; and rather small red or black berries. 

 Trailing: leaves spatulate, glabrate. A. Uva-ursi. 



Bushy : leaves ovate or elliptical, tomentose. A. tomentosa. 



VACCINIUM. Blueberry. 



Usually deciduous shrubs with rather hard brownish wood 

 with minute diffused ducts and fine medullary rays ; slender 

 angled twigs ; small angular continuous pith ; alternate raised 

 small crescent-shaped leaf-scars with a single bundle-trace ; no 

 stipule-scars ; small ovoid buds with about 2 exposed scales ; 

 characteristically oblanceolate rather small petioled leaves; per- 

 fect open or bell-shaped gamopetalous whitish flowers ; and 

 rather small inferior berries with small seeds. The first two 

 species (Cranberries) are often separated, as Oxycoccus. 



1. Evergreen: leaves small (under 2.5 cm. long). 2. 

 Deciduous : fruit black or glaucous. 5. 



2. Trailing slender vines: leaves very small (i cm.): 



flowers open : fruit red. 3. 

 Erect, more or less matted low shrubs. 4. 



