GENERA OF GRASSES OF THE UNITED STATES. 



79 



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FIG. 36. Triplasis purpurea. Plant, X J ; spikelet, floret (above) showing beard on tbx 

 nerves of the palea and cleistogene (at left), a cleistogamous fertile 1-flowered spikelet 

 from the axil of a lower leaf, aJl X 5. 



