LEGUMINOS/E 



451 



(Fig. 189) are in long clusters, twisted into three to live 

 spirals, and the edges bear numerous grooved spines which 

 interlock. The seeds are kidney-shaped, and about 2)^ milli- 

 meters long. Medicago arahica inermis is a spineless-podded 

 form. 



Fk;. 190.— Toothed bur clover ( M 



Spollrd bur clover is a native of Europe and Western 

 .\sia. It is introduced into the United States and occurs on 

 the Atlantic, Gulf, and California coasts. It is being used 

 as a [)aslurage crop. 



