236 



INDUSTRIAL PLANTS 



Fig. 222. — Broom-corn (Andropogon Sorghiun, Grass Family, GramUiew). 

 A, flowering top of wild form, known as Johnson ^Xi\&s {A. halcpensis) 

 from which broom-corn and the various other cnltivated sorghums are 

 believed to have been derived. B, flowering top of a cultivated form 

 (var. vulgaris) wliich differs from tlie form used for brooms (var. 

 technicus)miiin\y in having a more compact flower-cluster. BcT, B9 , 

 staminate and pistillate spikelets, enlarged. D, bract. K, fruit. 

 G, lodicules. (Reichenbach.) — Annual 2-3 m. tall; stem solid: flowers 

 concealed V>y bracts; fruit a grain. Native home. Mediterranean 

 Region (?). 



