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A TEXT-BOOK OF BOTANY 



sometimes protected. In Maine, the protected "blueberry 

 barrens" is said to include an area of about 150,000 acres. 



FIG. 290. A flower-cluster of rhododendron. After HOOKEK. 



171. Nightshades. This great family (Solanaceoe) in- 

 cludes plants with more or less conspicuous and regular 

 tubular corollas. The flowers have four cycles, a character 

 which distinguishes this family from the former one; and 

 regular corollas, a character which distinguishes it from the 

 next one. Perhaps the most familiar illustration of the 

 general type of flower is the morning-glory, which belongs to 



