Phoradendron 



LORANTHACEAE 



401 



o 50 



Map 816 



Boehmeria cylindrica IL.) Sv 



Map 817 

 Boehmena cylfndrica var. 

 Drummondiana Weddell 



~^6 



Map 818 



Parietarfa pennsylvanica Muhl, 



termediates are found that are difficult to place. The scabrous upper surface 

 of the leaves is not a constant character and is of little value. The long- 

 acuminate apex of the leaves generally holds for the species. The length 

 of the petioles, drooping leaves, and purplish achenes are the most reliable 

 characters for their separation. The wings of the achenes are variable in 

 both the species and the variety. Sometimes they are developed more on 

 one side than on the other; they may extend to the base on both sides or 

 on one side only ; the mass of them may be below the median line or it may 

 be above it. On the whole, the achenes with their wings are about 1-1.25 

 mm wide in the species and 1.25-1.5 mm wide in the variety. 



It is possible that the alkalinity of the soil has a decided influence on the 

 plant since most of my specimens are from a more alkaline soil than are 

 those of the species. The stem of the variety is usually much more 

 uncinate-pubescent than the stem of the species. 



Mass., N. Y., and Mich, to Kans., southw. to Fla. and Tex. 



2007. PARIETARIA L. 



1. Parietaria pennsylvanica Muhl. Pennsylvania Pellitory. Map 

 818. Infrequent to frequent throughout the state. It is usually found in 

 colonies in dry soil in all kinds of woodland but prefers a sandy soil and 

 is often found in large colonies in mucky or peaty areas that have been 

 drained. 



Maine, Minn, to B. C, southw. to Fla. and Mex. 



67. LORANTHACEAE D. Don Mistletoe Family 

 2089. PHORADENDRON Nutt. 



1. Phoradendron flavescens (Pursh) Nutt. American Mistletoe. Map 

 819. Formerly frequent to common in the southern counties, now almost 

 extinct. It no doubt covered the southern third of the state. There are 

 reports from as far north as Bartholomew and Franklin Counties and Ridg- 



