NITROGEN-CONSUMING PLANTS 



231 



Insect Powders. Insect powder is made from the finely ground flower 

 heads of Chrysanthemum pyrethrum. Dalmatian insect powder comes 

 from Chrysanthemum dneraricefolium and Persian from C. roseum. 



FIG. 98. Cauliflower (Brassica oleracea bolrytis) . A , entire plant ; B, portion of "head. 



(Robbins.) 



FRUIT CROPS 

 Temperate Lands 



Apple (Pyrus malus). The apple is cultivated extensively in a great 

 many varieties in America, Asia and Europe. 



Pear (Pyrus communis). The common pear is probably a native of 

 southern Europe and Asia with a fruit usually tapering to the base and a 

 flesh with grit cells. 



