i860 



A TEXTBOOK OF THEORETICAL BOTANY 



ursi (Red Bearberry) and A. alpina (Black Bearberry); Andromeda polifolia 

 (Wild Rosemary) and Arbutus unedo (Strawberry Tree), though rare as 



Fig. 1763. — Vaccinium myrtillus. Bilberry. 

 Shoot with young fruits. 



wild plants, are often cultivated. The latter grows in natural woods in 

 western Ireland. 



The plants are usually woody shrubs with leathery, evergreen, simple 

 leaves usually showing marked xerophytic characters. Many of the leaves 

 are characteristically rolled towards the abaxial surface, and the stomata 

 are restricted to the groove so formed and are further protected by branched 





I 



4. 



I 



Fig. 1764. — Floral diagrams of Ericaceae. A, Voccitiium vitis-idaea. B, Erica 



carnea. {After Eichler.) 



