PLANTS OF NORTH ELBA 121 



Polygonum Pennsylvanicum L. 



Hairy stalk persicaria. Pennsylvania persicaria 

 Gardens and cultivated fields. Rare. Lake Placid. August. 



Polygonum Persicaria L. 



Lady's thumb 

 Gardens and fields. Common. August. Introduced. 



Rumex crispus L. 



Curled dock 

 Fields, gardens and waste places. Common. July, Introduced. 



Rumex obtusifolius L. 



Bitter dock. Broad leaved dock 



Roadsides and waste places. Occasional. Lake Placid and near 

 North Elba post office. 



Rumex Acetosella L. 



Sheep sorrel. Field sorrel 



Fields, pastures and waysides. Abundant. A very pernicious weed. 

 This and the preceding species are introduced plants. 



THYMELEACEAE 

 Dirca palustris L. 



Leatherwood. Moosewood 



Damp soil. Rare. Wood's sap works. May. Remarkable for the 

 toughness of its bark and twigs. 



LORANTHACEAE 

 Razoumofskya pusilla (/%.) Kuntze' 

 Arceuthobium pusillum Pk. 

 Dwarf Arceuthobium 

 Parasitic on living branches of spruce trees. Avery ville swamp. 

 September. 



EUPHORBIACEAE 



Euphorbia Cyparissias L. 



Cypress spurge 

 Roadside at the cemetery from which it is spreading. Introduced. 



