Thk Gkassks of Tknnesske. 



95 



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Fig 6i. Poa arachnifera. — Texas Blue-grass. Showing the habit 

 of the grass and its creeping underground stems or rhizomes, 

 popularly called "roots." Drawn over the figure is a single stalk 

 of the grass showing more clearly the leaves and the contracted, 

 rather densely-flowered and interrupted panicle, usually called by 

 the farmer, the ''head." 



L 



