MONOCOTYLKDONS 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 C<ixin/H. 

 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 



