B04 A TEXT-BOOK OF BOTANY 
sometimes protected. In Maine, the protected “blueberry 
barrens’”’ is said to include an area of about 150,000 acres. 
Fic. 290.—A flower-cluster of rhododendron.— After Hooker. 
171. Nightshades.—This great family (Solanacec) 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 
