THE CLASSIFICATION OF VEGETABLES 
197 
other factors are considered. The system provides for 
two general classes ; namely, annual vegetables and 
perennial vegetables. These classes are then divided in 
subclasses according to the uses of the crops, and each 
subclass is composed of groups, determined mainly by 
their cultural requirements. The scheme of classification 
proposed by Professor Bailey is as follows: 
CLASS I. ANNUAL VEGETABLES 
Subclass I. Crops Grown for Subterranean Parts. 
Group 1. Root Crops. 
Beet (Beta vulgaris). 
Carrot (Daucus carota). 
Celeriac (Apium graveolens). 
Chicory (Cichorium intybus). 
Horse-radish* (Cochlearia armoracia). 
Parsnip (Pastiuaca sativa). 
Radish (Raphanus sativus). 
Salsify (Tragopogon porrifolius). 
Turnip and Rutabaga (Brassica). 
Group 2. Tuber Crops. 
Sweet potato (Ipomoea batatas). 
Group 3. Bulb Crops. 
Cive or Chive (Allium schoenoprasum). 
Garlic (A. sativum). 
Leek (A. porrum). 
Onion (A. cepa, A. fistulosum). 
Shallot (A. ascalonicum). 
Subclass II. Crops Grown for Foliage Parts. 
Group 4. Cole Crops. 
Broccoli (Brassica oleracea). 
Brussels sprouts (B. oleracea). 
Cabbage (B. oleracea). 
Collard (B. oleracea). 
Cauliflower (B. oleracea). 
*Horse-radish and dandelion are perennials but usually occupy 
the ground only one year. 
