14 PROCEEDINGS MANCHESTER INSTITUTE 



Pseudo-Cpyerus Iy. 



comosa Boott. 

 hystericina Muhl. 

 lurida Wahlenb. 

 retrorsa Schwein. 

 lupulina Muhl. 

 intumescens Rudge. 



" var. Fernaldi Bailey. 



folliculata L. 

 vesicar^a L. 

 rostrata Stokes. 



" var. utriculata (Boott) Bailey. 

 Tuckermani Dewey. 



Aracese 



Arissema triphyllum (Iy.) Schott. Common 



Peltandra virginica (Iy.) Kunth. Common 



Calla palustris L. Rare 



Symplocarpus foetidus (Iy.) Nutt. Common 



Acorus Calamus Iy. Common 



Liemnacege 



Spirodela polyrhiza (Iy.) Schleid. 

 Lemna trisulca L. 

 minor Iy. 



Eriocaulacese 

 Eriocaulon articulatum (Huds.) Morong. Common 



Xyridacese 



Xyris montana Ries. Concord. Rare 



flexuosa Muhl. Common 



