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 Cassiope, 

 showing trailing habit, small overlapping leaves, and sympetalous flowers, but in 

 the smaller form the petals are almost distinct. After DRUDE. 



Common representatives of the family are as follows : 

 huckleberry (Gaylussacia), cranberry and blueberry ( Vac- 

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



