ARISTOLOCHIACEAE 285 



2. Phoradendron Nutt. 

 1. P. flavescens (Pursh) Nutt. Parasitic on deciduous leaved 

 trees, notably on the Tupelo and Red Maple: N. J. to Ohio, 

 Ind., Mo., Fla., Texas. 

 N. J. Keyport, Monmouth Co. and Hightstown, Mercer Co. 



increasing southward. 

 Pa. Schuylkill, Delaware and Chester counties. 



SANTALACEAE 



1. Comandra Nutt. 



1. C.umbellata (L.) Nutt. Dry fields and thickets: Cape Breton 



Is. to Ont., Br. Col., Ga., Ariz, and Cal. 

 Throughout the range. 



ARISTOLOCHIACEAE 



Acaulescent herbs; perianth regular, persistent; filaments distinct. 1. Asarcm. 

 Vines or erect leafy-stemmed herbs; perianth irregular, deciduous; 

 anthers sessile. 2. Aristolochia. 



i. Asarum L. 



Calyx segments lanceolate acuminate, longer than the tube, not 



reflexed. I. A. canadense. 



Calyx segments triangular, merely acute, about as long as the tube, 



reflexed; the tip obtuse. 2.-4. reflexum. 



i. A. canadense L. Rich woods: N. B. to Man., Ont., N. C, 

 Mo. and Kan. 

 Conn. Not common along the coast, increasing and common 



northwestward. 

 N. Y. Reported, but not definitely known from L. I., perhaps at 



Newtown, increasing and common northward up the Hudson 



Valley. 

 N. J. Rare in Gloucester, Camden, Burlington and Monmouth 



counties, thence increasing and common northward. 

 Pa. Northampton, Chester and Delaware counties. 



Tertiary, o: Cretaceous, not common: Older Formations, in- 

 creasing and common northward. 117-190 days. Sea level- 

 3,200 ft. 



2. A. reflexum Bicknell. Rich or wet woods: Conn, to Iowa, 



N. C, Mo. and Kan. 



Conn. Fairfield and Litchfield counties. 



