FORMS OF ROOTS 



59 



numerous branching fibres. In Wheat, Oat, Maize, roots 

 are developed not as branches of the radicle, but from the 

 stem. The radicle is usually short-lived, and the roots are 

 all similar and slender, and known as fibrous roots (Fig. 26, 

 4). As they are developed from some part of the plant 



Fig. 26. Abnormal Forms of Roots. 1, conical 

 root of Carrot; 2, spindle-shaped root of Radish; 3, 

 globular root of Turnip ; 4, fibrous roots of Grass ; 

 5, plant of Duckweed ; P, flattened leaf -like stem ; 

 r, root ; r.p, root-pocket. 



other than the radicle and its branches, they are known as 

 adventitious roots, and in Monocotyledons they are the most 

 common kind. 



Storage, climbing, and aquatic roots. In exceptional 

 cases (Fig. 26, 1-3) roots thicken considerably. The tap- 

 root becomes conical in the Carrot and Beet, and spindle- 

 shaped and sometimes globular in the Radish. The Lesser 



