278 BOTANY. 



555. The Gamopetalse 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 Choripetalse 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, 



Fio. 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-irees 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 

 Choripetalse and Gamopetalse. 



For the identifloation 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." 



