40-1: 



NYCTAGINACE.-E. Tue JTrcxAQo Family. 

 Allionia, Linn. 



albiJa, Wallr. St Croix River, Dr. Houghton, 

 nyctaginea, Micbx. St. Croix River, Dr. Houghton. 



OxYBAPHus ANGusTiFOLius, Torr. St. Croix, Dr. Parry. 



POLYGONACE.E. The Buckwheat Family. 



Polygonum, Linn. 



Pennsylvanicum, Linn. 



Persicaria, Linn. 



Hydropiper, Linn. P. punctatura, Ell. 



hydropiperoides, Michx. 



aruphibiiim, Linn. 



aviculare, Linn. Knot-Grass. 



articulatum, Linn. Lakes Michigan and Superior, Dr. Houghton. 



Virginianum, Linn. 



sagittatum, Linn. 



Convolvuhis, Lion. 



cilinode, Michx, Lake Superior, Dr. Houghton. 



dumetorium, Linn. P. scandens, L. 



RuMEX, Linn. Dock. 



Britannica, Linn. 



crispus, Linn. Curled Dock. 



Acetosella, Linn. Sorrel. 



hydrolapathum, Hudson. St. Croix. Dr. Parry. 



THYMELEACE.E. The Mezereum Family. 

 DiRCA, Linn. Leatherwood. 

 palustris, Linn. 



EL^AGNACE^E. The Oleaster Family. 

 Shepherdia, Nutt. 

 Canadensis, Nutt. 



SANTALACE.E. The Sandal Wood Family. 



COMAXDRA, i!^Utt. 



umbellata, Nutt. 



ULMA.CE.E. The Elm Family. 



Ulmus, Linn. Elm. 



Americana, Linn. White Elm. 

 fulva, Michx. Slippery Elm. 



