MBI0ALE8. 



509 



The EricinesB are doubtless to be regarded as the central or main 

 group, from which the others have diverged. In the diagram the dis- 

 tinguishing characters which are given for Ericineae may be regarded 

 as typical for tlie order, and under each of the other sub-orders are 

 given the exceptional characters, or more properly, the modifications of 

 the original ordinal characters. 



Sub-Order Ericinem. — About 1000 species of shrubs, many 



evergreen. Many are j.^^^ 436-9.-Ii,h7stbation8 of Ebioa cinerea. 

 of great beauty, and are 

 extensively grown as 

 ornaments ; others are 

 good-sized trees, and 

 furnish valuable tim- 

 ber. (Figs. 436-9.) 



Arbutus Menziesii, 

 the MadroSa of the Pa- 

 cific coast of the Unit- 

 ed States, is an ever- 

 green tree twenty-four 

 to thirty metres (80 to 

 100 ft.) in height. Its 

 hard wood is useful in 

 furniture-making. 



Aretostaphylos pun- 

 gens and A. glauca are 

 large evergreen shrubs 

 of California, which 

 bear the name of Man- 

 zanita. The heavy, 

 dark-colored, and fine- 

 grained wood is used in 

 turnery and furniture- 

 making. The berries 

 are eaten by grizzly 

 bears. 



A. Uva-ursi, the 

 Bearberry of the colder 

 portions of North 

 America, Europe, and Asia, bears bitter and astringent leaves, which 

 are officinal. 



Calluna wilgans, the Common Heath of Central and Northern Europe, 

 is a low, straggling evergreen under-shrub. Its stems are made into 

 brooms, and its flowers aflTord an abundance of excellent honey. It 

 occurs in a few scattered localities in Massachusetts, Maine, Nova 

 Scotia, and northward, but it is doubtful whether It is really indigenous 

 to any part of tLe United Stales. 



Fio. 438. 



Fie. 439. 



Fig. 436.— Jflowering 6 



Fig. 437.— Section of flower. Magnified. 



Fig. 438.— Diagram of flower. 



Fig. 439.— Section of ovary. Magnified. 



