278 BOTANY. 
555. The Gamopetale are of higher value as food-fur- 
nishers, supplying us with the Potato, Tomato, Sweet- 
potato, Artichokes, Olives, Huckleberries, Cranberries, 
Coffee. Of timber, the Catalpa, Ebony, and Ash are the 
more important of those in common use. 
556. The Choripetale contain more plants which supply 
us with food than either of the preceding. Thus we have 
from these Parsnips, Carrots, Cucumbers, Melons, Squashes, 
Pumpkins, Apples, Pears, Strawberries, Blackberries, 
Fie. 156.—Flower-cluster of the Pear (Pirus communis), 
Raspberries, Plums, Peaches, Cherries, Beans, Peas, Grapes, 
Cabbage, Turnips, Radishes, and Tea. From this group 
we get flax and cotton, two of the most important fibres 
in the world. The timber-trees of most importance are 
the Maples and the Lindens, the Magnolias and the Tulip- 
trees. 
557. The two drugs of greatest value medicinally, viz., 
opium and quinine, are furnished respectively by the 
Choripetale and Gamopetale. 
For the identification of the species of phanerogams of this country 
the student may profitably use Asa Gray’s ‘‘Manual of the Botany 
of the Northern United States” or A. W. Chapman’s ‘Flora of the 
Southern States,” 
