20 TRIANDRIA. digynia. 



Poa. fluitans. Sm. 

 In ditches and overflowed grounds. U . June — July. 

 5 nutans. Willd. On rocky shady hills. Hoboken, &c. U- 

 June — July. 



56. Bromus. L. Brome-grass. 



1 secalinus. L. ( Chess or Cheat. ) In grain fields. %. 



Jul} — Aug. §. 



2 purgans. L. Fields and road sides. U- July. § ? 



3 mollis. L. In fields and pastures. July. 



4 pubescens. Muhl. Gram. In woods. U . June — July. 



5 ciliatus. L. 

 Canadensis. Mx. 



In moist rocky situations, if. July. 



57. Aristida. L. 



1 dichotoma. Mx. 



Curtopogon dichotomum. P. de B. 

 In gravelly fields and on rocks. U • Sept. 



2 racemosa. Muhl. Gram. Sandy fields. Long-Island and 



Staten Island. — Sept. 



58. Stipa. L. Feather-grass. 



avenacea. L. Walt, 

 bar bata. Mx. 

 Virginica. Pers. 

 In sandy pine woods near South-Amboy. N. Jersey. U • June. 



59. Arundo. L. Reed-grass. 



1 Phragmites. L. About Elizabethtown and on Coney 



Island. 14 . July. 



2 agrostoides. Ph. 



Agrostis ? glauca. Muhl. Gram. 

 In swamps. New-Jersey. Ed. v. s. in Herb. Edd. 



60. Avena. L. Oat-grass. 



Pennsylvania. L. 

 Trisetum Pennsylvanicum. P. de B. 

 In woods among rocks, u . July. 



61. Danthonia. Decand. 



spicata. Nutt. 

 Avena spicata. L. Muhl. 

 In dry open woods. U- July. 



62. Andropogon. L. Beard-grass. 



1 purpurascens. Muhl. Gram, 

 scoparius. Mx. 



Pollinia scoparia. Spreng. 

 Dry barren soils. U . Aug. 



2 Virginicus. Muhl. Gram, 

 argenteus. Ell. 



Anatherum Virginicum. Spreng. ( Broom-grass. J 

 In exsiccated swamps. U . Sept. 



3 nutans. L.-Muhl. Gram, 

 avenaceus. Mx. 



In arid soils. U • Sept. 



4 macrouros. Mx. In swamps. New-Jersey. U • Sept. 



