344 



BOTANY OF CROP PLANTS 



Radishes vary in color: some varieties are white, others pink, red, purple, 

 mottled, or black, or red, tipped with white, etc. 



RADICXILA (Water Cress and Horse-radish) 



Members of this genus are branching herbs with simple or 

 pinnate lobed, dissected, or rarely, entire leaves. Flowers are 



Fig. 143. — Types of radishes (Raphanus sativus). A, turnip-shaped; B, 

 globular; C, olive-shaped; D, half-long; E, long. (After Corbeit.) 



in elongated racemes; they have spreading sepals, yellow or 

 white petals, and one to six stamens. The siliques are short or 

 elongated, pencil-shaped, without a stalk or stipe, with one- 

 nerved valves; there are numerous turgid seeds in two rows in 

 each cell, or very rarely one row in each cell. 



