MONOCOTYLEDONS AND DICOTYLEDONS 269 



of the pollen-sacs by terminal pores, which are often pro- 

 longed into tubes (Fig. 255). 



Fig. 254. Characteristic heath plants: A, B. C\ Lyonia, showing sympetalous flowers 

 and single style from the lobed syncarpous ovary; Z>, two forms of Cas/^iope, 

 showing trailing habit, small ovorlapi)ing leaves, and symi)etal()ns flowers, but in 

 the smaller form the petals are almost distinct.— After Duude. 



Common representatives of the family are as follows : 

 huckleberry (Gaylussacia), cranberry and blueberry ( Vac- 

 cinium), bearberry (Arctostaphylos), trailing arbutus {Epi- 



