Agrostis 



alba. Linn. White-top. Fiorin-grass. 



clandestina. Sprengel. 



Juncea. Mich a u x. 



lateriflora. M i c h a u x. 



serotina. Torrey. 



stolonifera. Linn. 



stricta. Will de now. 



tenuiflora. W i 1 1 d e n o w. 



Yirginica. Linn. 



vulgaris. S m i t h. Red-top. 



Aira 



aristulata. Torrey. 

 ceespitosa. Linn, 

 flexuosa. Linn. Hair-grass. 

 pumila. P u r s h. 



Aletris 



farinosa. Linn. Unicorn-root. 



Alisma 



triviale. P u r s h. Water-Plantain. 



Allium 



Canadense. Linn. Meadow-garlic. 

 tricoccum. A i t o n. 

 triflorum. R a fines que. 



Alnus 



serrulata. Wi lid enow. Aldei\ 



Alopecurus 



pratensis. Linn. Fox-tail. C. 



Amarantus 



albus. Linn. 

 hybridus. Linn, 

 pumilus. N u 1 1 a 1 1. 

 sanguineus. W i 1 1 d e n o w. 



Ambrosia 



elatior. Linn. Roman-Wormwood. 



triiida. Linn. Great-bittcr-icecd. 



Amelanchier 



Botryapium. DeCandolle. Shad-tree, 

 oralis. DeCandolle. 



Ammannia 



remosior. Linn. 

 Am pel ops is 



quinqueiblia. M i c h a u x. t . 



Amphicarpaea 



monoica. DeCandoll-e. 



sarmentosa. D e C n n d o ' 



