298 



ERICACEAE. 



CALLUNA. Heather. 

 (Family Ericaceae). 



Small shrubs: evergreen. Twigs 

 very slender, terete: pith very 

 small, roundish, continuous. Buds 

 small, solitary, sessile, angularly 

 globose, with about 3 scales, 

 usually developing promptly. Leaf- 

 scars opposite, minute, half-round 

 . or crescent-shaped: bundle-trace 1: 

 stipule-scars lacking. Leaves 

 small, V-shaped, grooved on the 

 keel, closely overlapping in 4 

 ranks except on elongated shoots. 



The winter-characters of Cal- 

 luna vulgaris are indicated by 

 Bosemann, 33. 



Heather, one of the most char- 

 acteristic shrubs of European re- 

 gions where soil sterility and 

 mist meet, occurs in this country 

 only along the northern Atlantic 

 seaboard. 



Twigs puberulent: leaves glabrous. 



C. vulgaris. 



