428 THE PLANT LIFE OF MARYLAND 



Humulus lupulus L. Hop. 



Upper Midland District, in dry thickets, infrequent. 

 Washington County, Weverton (1770). 



URTICACEAE. 



Urtica dioica L. Nettle. 



Throughout the state; in waste grounds; common. 



Urticastrum divaricatum (L.) Kuntze. Wood Nettle. 



Throughout the state; in swamps, flood plains and moist forests; 



common. 

 Cecil County, North East (394). 



Adicea pumila (L.) Raf. Richweed. 



Throughout the state; in swamps and moist forests; common. 



Boehmeria cylindrica (L.) Willd. False Nettle. 



Throughout the state; in moist forests and open situations. 

 Cecil County, North East (391). 



Parietaria pennsylvanica Muhl. Pennsylvania Pellitory. 



Upper Midland District and Mountain Zone; in moist and dry forests; 



frequent. 

 Washington County, Hancock (831). 



LORANTHACEAE. 



Phoradendron flavescens (Pursh.) Nutt. American Mistletoe. 



Common in the Coastal Zone, rare in the Midland Zone; parasitic on 



deciduous trees, preferring oaks and Red Maple. 

 Somerset County, near Pocomoke City (1150). 



SANTALACEAE. 



Comandra umbellata (L.) Nutt. Bastard Toad Flax. 



Rare in the Coastal Zone; common in the Midland and Mountain Zones 



in dry forests and open situations, preferring sandy soil. 

 Washington County, near Hancock (800). 



ARISTOLOCHIACEAE. 



Asarum canadense L. Wild Ginger. 



Rare in the Coastal Zone; common in the Midland and Mountain Zones 

 in moist forests. 



Aristolochia serpentaria L. Virginia Snakeroot. 



Throughout the state; in moist forests; rare. 

 Caroline County, near Denton (1646). 



