258 HORTICULTURIST'S RULE-BOOK. 



There are more than 30 genera and about 300 species In the 

 family. Of pines there are about 70, and 35 of them are native 

 to the United States. 



There are about 74 genera of ferns or Filices, and in the neigh- 

 borhood of 2400 species. Some of the species attain to the size of 

 small trees. 



7. Classification of Horticulture. 



(Bailey, Annals of Horticulture, 1891.) 



I. POMOLOGY, the art and science of growing fruit. 



1. Viticulture, or Grape-Growing. 



2. Orchard Culture, comprising: 



Pomaceous fruits ; Drupaceous or Stone fruits ; 

 Citrous fruits ; Nut fruits (Nuciculture) ; Palma- 

 ceous fruits ; and others. 



3. Small- Fruit Culture, comprising: 



Bush fruits (raspberry, blackberry, dewberry, cur- 

 rant, gooseberry, juneberry, and others) ; Straw- 

 berries. 



4. Cranberry Culture. 



II. OLERICULTURE, the art and science of growing kitchen- 

 garden vegetables. Comprises the following groups or 

 esculents : 



Radicaceous (potatoes and root crops) ; Brassicaceous 

 (cabbage-like plants); Alliaceous (onion-like plants); 

 Spinaceous and Acetariaceous (salad and salad-like 

 plants); Asparagaceous (asparagus, chicory, sea-kale 

 and the like) ; Leguminaceous (peas and beans) ; Cucur- 

 bitaceous (melons, cucumbers, squashes); Solanaceous 

 (red peppers, tomatoes, egg-plants) ; Aromatic esculents 

 and sweet herbs ; Cryptogamic esculents (mushrooms). 



III. FLORICULTURE, the art and science of cultivating orna- 



mental plants for their individual uses. 



IV. LANDSCAPE-HORTICULTURE, the art and science of growing 



ornamental plants, especially trees and shrubs, for their 

 uses in the landscape. Generally confounded with 

 landscape-gardening. 



