Repoet of the Botanist. 59 



Rajdula pallens, Nees. 



Shaded rocks. Catskill Mountains. Sterile. Not common. 



LICHENS. 

 TJSNEA BAEBATA Vai\ FLOEIDA, Fr. 



Trees, especially in mountain woods. Common and fertile. 



TJSNEA BAEBATA Vai\ HIETA, Fr. 



Old rail and board fences. Common, but sterile. 

 Usnea baebata var. dasypoga, Fr. Trees on mountains. 



TJSNEA LONGISSIMA, Ach. 



Trees. Adirondack Mountains. 



Tins and the preceding species are plentiful in low woods in 

 North Elba, frequently giving a peculiar gray hue to whole tracts 

 of balsam firs, which trees are especially subject to the attacks of 

 these parasites. The opinion is prevalent among the inhabitants 

 that the " gray moss " causes the death of the tree on which it 

 grows. Certainly no thrifty tree can be found with an abundance 

 of these lichens upon it. All thus infested are either dead or 

 apparently dying, the leaves being limited to the mere extremities 

 of the branches. The inference is that the lichens have induced 

 the death or the diseased condition of the tree. It is probable that 

 this is to some extent true, and yet, on the other hand, the death of 

 the tree from other causes affords conditions favorable to the growth 

 of the lichen. The shore of Lake Placid is in some places bor- 

 dered by dead trees loaded with these same species of Usnea. 

 These trees were killed by the inundation of their roots, the water 

 of the lake having been raised by a dam at its outlet, and, so far as 

 can be ascertained, they were destitute of these lichens while 

 living. 



Alectoeia jubata var. chalybeifoemis, Ach. 



Trees, old fences, and sometimes on rocks. Common, but sterile. 



Alectoeia jubata var. implex a, Fr. 



Trees in mountain woods. Adirondack Mountains. Sterile. 



EVEENIA PEUNASTBI, Ach. 



Trees and old fences. Fertile specimens were found on trees and 

 on shrubs in a swamp, Catskill Mountains. 



EVEENIA FUEFUEACEA, Mann. 



Trees in woods. Common. 



