122 ERICACEAE 



1. Neither matted nor prostrate. 2. 



With spreading or prostrate branches. C. vulgaris prostratu. 

 Forming low dense mats. C. vulgaris naiia. 



2. Gray-woolly. C. vulgaris hirsuta. 

 Not gray-woolly. 3. 



3. Flowers white. 4. 

 Flowers pink or red. 5. 



4. Flowering in early autumn. C. vulgaris alba. 

 Flowering very late. t C. vulgaris Searlei. 



5. Flowers pink or rosy. 6. 



Flowers carmine. C. vulgaris rubra. 



6. Flowers single. C. vulgaris. 

 Flowers double. C. vulgaris plena. 



CHIOGENES. Moxie Plum. 



Delicate trailing evergreen shrubs with very slender sub- 

 terete twigs, minute roundish homogeneous pith; alternate low 

 half-round or crescent-shaped minute leaf-scars with a single 

 bundle-trace; no stipule-scars; minute flattened buds; small 

 broad pointed subsessile leaves; small pale perfect cup-shaped 

 gamopetalous flowers solitary in the axils; and berry-like fruit. 

 Stem rough: leaves glabrous above, revolute. C. hispidula. 



GAYLUSSACIA. Huckleberry. 



Rather small mostly deciduous shrubs with roundish slen- 

 der twigs; roundish homogeneous pale pith; alternate small 

 low crescent-shaped leaf-scars with 1 bundle-trace; no stipule- 

 scars; solitary small sessile ovoid buds with about 3 exposed 

 scales; simple usually entire and resinous-dotted rather small 

 short-stalked leaves; small perfect often reddish urn-shaped 

 gamopetalous flowers; and berry-like fruit with the seeds en- 

 closed singly in core-like small shells. 



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. 



