126 



WEEDS OF THE FARM AND GARDEN 



flowers are produced by the same in- 

 dividual plant, as in corn ; dioecious 

 when the two kinds are borne on dif- 

 ferent plants, as in willows, poplars, 

 hemp, and moonseed. Polygamous 

 when some of the flowers are perfect 



Fig. 63. Inflores- 

 cence. Panicle of 

 grass. 



Fig. 64. Inflorescence. Head of 

 clover. (C.M.King.) 



and some have pistils or stamens only. 

 Flowers in which the petals are sepa- 



Fig.6 5 . Inflorescence. rate are calle ? polypetalous ; when the 

 Head of wild lettuce, petals are united, gamopetalous; when 

 The type of inflores- t h e pe tals are wanting, apetalous. 



cence in the sunflower T l _ fw. 



family. (C. M. King.) * n some flowers different parts or 



