CLASSIFICA TION. 709 



(Cornus florida), abundant in eastern North America, is an 

 example. 



SERIES 2 GAMOPETAL.E ( = Sympetake or Metachla- 

 mydae) . Petals partly or wholly united, rarely separate or wanting. 



1224. Order Ericales. There are six families in eastern 

 United States. Examples: 



The wintergreen family (Pyrolaceae), including the shin-leaf 

 (Pyrola elliptica). 



The Indian-pipe family (Monotropaceae), with the Indian- 

 pipe (Monotropa uniflora) and other humus saprophytes. (See 

 paragraphs 182-191.) 



The heath family (Ericaceae). Examples: Labrador tea 

 (Ledum), in bogs and swamps in northern North America. 

 The azaleas, with several species widely distributed, are beauti- 

 ful flowering shrubs, and many varieties are cultivated. The 

 rhododendrons are larger with larger flower-clusters, also beau- 

 tiful flowering shrubs. R. maximum in the Alleghany Moun- 

 tains and vicinity, from Nova Scotia to Ohio and Georgia. R. 

 catawbiense, usually at somewhat higher elevations, Virginia 

 to Georgia. The mountain laurel (Kalmia latifolia) and 

 other species rival the rhododendrons and azaleas in beauty. 

 The trailing arbutus (Epigaea repens) in sandy or rocky woods is 

 a well-known small trailing shrub in eastern North America. 

 The sourwood (Oxydendrum arboreum) is a tree with white 

 racemes of flowers in August, and scarlet leaves in autumn. 

 The spring or creeping wintergreen (Gaultheria procumbens) is 

 a small shrub with aromatic leaves, and bright red spicy berries. 



The huckleberry family (Vaccinaceae) includes the huckle- 

 berries (example, Gaylussacia resinosa, the black or high- 

 bush huckleberry, eastern United States), the mountain cran- 

 berry (Vitis-Idaea vitisidaea=Vaccinium vitisidaea) in the north- 

 ern hemisphere; the bilberries and blueberries (of genus Vacci- 

 nium); the cranberries (examples: the large American cranberry, 

 Oxycoccus macrocarpus and the European cranberry, Oxycoc- 

 cus oxycoccus, in cold bogs of northern North America, the 

 latter also in Europe and Asia). 



