PLANTS OF NORTH ELBA 



227 



Puccinia Circaeae Pers, 

 Living leaves of small enchanter's nightshade, Circaea alpina. Northern 

 entrance to Indian pass. August. 



Puccinia Tiarellae B. cV C. 



Living leaves of false mitrewort, Tiarelia cordifolia. Wood farm. 

 August. This is thought by some to be the same as P. Heucherae Schw. 



Puccinia porphyrogenita Curt. 

 Living leaves of dwarf cornel, Cornus Canadensis. Woods east of 

 Brewster farm. August. 



Puccinia mesomegala B. cV C. 



Living leaves of northern clintonia, Clifitonia borealis. Old Keene 

 road. June and July 



Triphragmium clavellosum Berk. 



Living leaves of wild sarsaparilla, Aralia nudicaulis. Ausable valley. 

 August. 



Peridermium balsameum Pk. 



Living leaves of balsam fir. Woods east of Brewster farm. August. 

 This parasitic fungus discolors the affected leaves but they attain their 

 usual size. 



Peridermium elatinum {A. & S.) K. cV S. 



Living leaves of balsam fir. July. This fungus affects both branches 

 and leaves. It causes an abnormal development of the branch attacked, 

 increasing greatly the number of shoots and making a dense cluster 

 commonly known as crow's nest. All the leaves on an affected branch 

 show the presence of the fungus and attain only about half their usual 

 size. Generally the attack is limited on a tree to a single branch and its 

 branchlets, but the fungus is perennial and persists till the branch dies. 



Peridermium decolorans Pk. 



Living leaves of spruce trees. Top of Mt Mclntyre. July and 

 August. This was made a variety of P. abietinum A. & S. by Thumen, 

 but I see no good reason for so doing. 



Peridermium Engelmanni Thum. 

 On spruce cone scales. Rare. In thin woods southwest of North 

 Elba post office. August. Only a few cones on a tree were affected. 



