EUPHORBIA. 



205 



cies. The original one {E. officinarumf), discovered by 

 King Juba in Barbara, was so named by him in honor of 

 Euphorbus, his chief physician. 



Fig. LV.-Euph6ibia macumta : 2, section of an involucre showing the <^ flowers ; 

 3 a r^ flower with its bract; 4, an invohicre entire, showing; the 1 9 flower, etc.; 5, 

 section of ovary ; 6, section of a seed of £'. Ldthyns, with embryo, and (,(i) caruncle. 



Specific Character.— The species before ns differs from 

 all others in the followino- combination of characters : Root 



