1G TRIANDRIA. DIGYNIA. 



>8 sobolifera. Muhl. Gram. On rocks in Bloomingdale 



woods. V-. Aug. 

 9 diffusa. Muhl. Gram. On the hills near Hoboken. N, 



Jersey. i|i. Aug. 



38. Polypogon. Desf. 



glomeratus. Willd. R. &. S. 

 setosus. Spreng. R. & S. 

 racemosus. Nutt*. 

 Agrostis setosa. Muhl. Gram, 

 racemosa. Mich. 

 In Hackensack meadows. %. Aug — Sept. 



39. Aira. L. Hair-grass. 



1 mollis. Muhl. Gram. In dry woods. %. May— July. 



2 truncata. Muhl. Gram. 

 Pennsylvanica. Spreng. 

 obtusata. Mx. 



Airopsis obtusata. Desf. R. &. S. 

 Koeleria Pennsylvanica. Decand. R. &. S* 

 Holcus striatus. L. ? 

 In rocky woods. Hoboken. 1{. June. 



3 melicoides. Mx. 

 triflorum. Ell. 



Poa melicoides. Nutt. 

 Graphephorum melicoides. P. de B. 

 "With the preceding species. If. . June. 



4 pallens. Muhl. var. aristata. 

 Avena palustris. Mich. 



In wet meadows. New-Jersey. %. June. 



5 caespitosa. L. In woods near South-Amboy. U . June. 



40. Uralepsis. Nuttall. 



aristulata. N. 



Aira purpurea. Muhl. Gram, non Walt. 

 On the gravelly banks of the Hudson, and on the sea coast of 

 Long-Island. ©. Aug. — Sept. 



41. Holcus. L. Soft-grass. 



1 lanatus. L. In meadows. If. May — July. § ? 



2 fragrans. Willd (Seneca-grass. J 

 odoratus. Mx. 



Hierochloa fragrans. R. & S. 

 In meadows near Greenwich. %. May 2d. — June. 



42. Phaiaris. L. Canary -grass. 



1 Americana. Ell. 

 arundinacea. Mx.-Muhl. 

 Calamagrostis colorata. Nutt.-Sibth ? 



In bog meadows. New- Jersey, u* Aug. 



2 maritima. Nutt. 

 Arundo arenaria. L. 

 Psamma arenaria. R. & S. 



Common on the sandv sea coast near New-York. If. Aug 

 —Sept. 



