CATALOGUE OF PLANTS. 221 



B. nigra, L. River Birch. Red Birch. 



Along rivers and lakes. Common throughout the State. 

 Especially abundant along the Delaware and all its tributary 

 streams. 



B. pumila, L. 



Swamps in the northern counties. Sussex : Newton Garber ; 

 common on Germany Flats and along the Wallkill between 

 Ogdensburg and Sparta Britton. Morris : Budd's Lake 

 Porter. Warren : Swamp on Jenny Jump Mt., near Green's 

 Pond Britton. 



ALNUS, L. 



Alder. 

 A. incana (L.), Willd. 



Low grounds in the northern counties. Morris : Budd's 

 Lake Porter. Sussex : Near Andover and at Culver's Gap 

 Britton. 



A. serrulata, Willd. Candle Alder. 



In low grounds. Common throughout the State. 



A. GLUTINOSA, Willd. 



Essex : A single tree, some thirty feet high, along the canal at 

 Belleville Rusby. Fugitive from Asia. 



CARPINUS, L. 



Hornbeam. Iron-wood. 

 C. Caroliniana, Walt. (C. Americana, Michx.) 



River banks and in copses. Common throughout the State, 

 except in the pine barrens. 



OSTRYA, Scop. 

 Hop-Hornbeam . 



O. Virginiana (Mill.), Willd. 



Along river banks, etc. Bergen : Closter Austin ; Palisades 

 Leggett. Sussex : Swartswood Lake Britton. Warren : River 

 hills from Phillipsburg southward Porter. Hunterdon : Along 

 the Delaware Best. Somerset : Along the Raritan at Roxiticus 

 Britton. 



