GENERA OF GRASSES OF THE UNITED STATES. 19 
Fic. 26.—Triplasis purpurea. Plant, * 43 spikelet, floret (above) showing beard on thu 
nerves of the palea and cleistogene (at left), a cleistogamous fertile 1-flowered spikelet 
from the axil of a lower leaf, all * 5, 
