MULBERRY 



223 



from the seed, but will not come true to type and requires 

 three years to come to maturity. It is much better to secure new 

 plants by dividing the crowns. This family includes many 

 important weeds; among the most troublesome is the sorrel, 

 which grows in great abundance in sour (acid) soil. It can 



Fig. 146. — Buckwheat. 



be eradicated by heavy applications of lime and the use of 

 legume crops. The docks are also members of this family. 



NETTLE FAMILY (URTICACE^) 



This family contains herbs, shrubs and trees and includes 

 some very important plants. Flowers monoecious, dioecious or 

 rarely with perfect flowers ; calyx regular ; stamens as many 

 as the tubes of the calyx or fewer and opposite them; pistil 

 one with two cells. 



The mulberry (Morus rubra, American red mulberry, and 

 .V. alba, Asiatic white mulberry) is well known. The flowers 



