212 
URTICACEAE, nettle family 
BOEHMERIA 
Boehmeria cylindrica (L.) Sw., false nettle, p. 568 
var. cylindrica 
var. drummondiana (Wedd.) Wedd. [G: B. cylindrica] (the 
validity of this taxon has not been studied critically) 
LAPORTEA 
Laportea canadensis (L.) Wedd., wood nettle, p. 568 
PARIETARIA, pellitory 
Parietaria pensylvanica Muhlenb. ex Willd., Pennsylvania pellitory, 
pellitory, p. 570 
var. obtusa (Rydb. ex Small) Shinn. 
var. pensylvanica 
PILEA 
Pilea pumila (L.) A. Gray, clearweed, p. 570 
URTICA, nettle 
Urtica chamaedryoides Pursh, nettle, weak nettle, p. 567 
U. dioica L., tall nettle, p. 567 
Ssp. gracilis (Aiton) Selander [S: U. dioica var. procera 
Muhlenb. ex Willd.) Wedd.] (Woodland, 1982) 
¢U. urens L., dwarf nettle, burning nettle, p. 567 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
