96 KANSAS Academy of Science. 



75. S. dejjauperatus Torr.; Drop-seed grass. 



76. ,S. heterolejns Gr.; Drop-seed grass. 



77. )S. cryptandrus Gr.; Drop-seed grass. 



78. S. airoides Torr.; Salt grass, Drop-seed grass. 



79. S. asperifoliwi N.<fe M.; Drop-seed grass. 

 79i. S. Arkansana {T Tin.); Drop-seed grass. 



20. PoLYPOGON Desf. 



a. Panicle dense, soft, yellowish-green; awns conspicuous, long 80 



a. Panicle narrow, much-lobed, usually purplish ; awns shorter 81 



80. Polypogon Monspeliensis Desf.; Annual Beard-grass. 

 SI. P. littoralis Sm.; Perennial Beard-grass. 



21. CiNNA L. 



a. Panicle rather dense, branches spreading in flower, spikelets 2i-3 lines long 82 



a. Panicle loose and more slender, branches drooping in flower, spikelets li-2 lines long 82^ 



82. Cinna arundinacea L.; Wood Reed grass. 

 S2h. C. pendulaTvin.; Wood Reed grass. 



22. Agbostis L. 



a. Palet present {b). 



a. Palet entirely wanting or very minute (c). 



b. Ligule short and truncate; panicle slender, usually spreading in flower 83 



b. Ligule long and acute, panicle as above 83i 



b. Ligule obtuse, flowering glume with a longitudinal furrow on back 84 



c. Culms firm or stout, 2-3 ft. high; upper ligules 2-3 lines long 85 



c. Culms slender or very slender, 1-2 feet high {d). 



d. Stems slender, panicle pale-green, branches fl.-bearing from or below the middle 86 



■d. Stems very slender, panicle purplish, branches fl.-bearing at or near apex 87 



83. Agrostis vulgaris With.; Red-Top, Fine-Top, Borden's grass, Bent grass. 

 885. A. alba L.; Fiorin, White Bent grass, Red-Top. 



84. A. exarata Trin.; Northern Red-Top, Mountain Red-Top. 



85. A. elata Trin.; Bent grass. 



86. A. perennans Tuck.; Thin grass. Bent grass. 



87. A. scabra WMlld.; Hair grass. 



23. Calamagkostis Roth. 



o. Awn delicate, straight, not exceeding the hairs 88 



a. Awn bent or twisted when dry, surpassing the flowering glume 89 



88. Calamagrostis Canadensis Beauv. ; Small Reed-grass, Blue-Joint. 



89. C. eonfinis Nutt.; Reed Bent-grass. 



24. Ammophila Host. 

 a. Culms 3-6 ft. high, panicle 4-16 inches long, palet equal and similar to glume 90 



90. Ammophila longifolia Vasey; Long-leaved Reed grass. 



25. Deschampsia Beauv. 



a. Awn slender, about as long as fl.-glume, culm 2-4 feet high 91 



a. Awn about half longer, becoming bent and twisted, culm \{-2 ft 92 



91. Deschampsia flexuosa Griseb.; Wood Hair grass. 



92. D. caespitosa Beauv.; Hair grass. 



26. Danthonia DC. 

 a. Culms tufted, low, spikelets few, 3-5 lines long 93 



93. Danthonia spicata Beauv.; Spiked Wild Oat grass. 



