Howe : Preliminary notes on the genus Usnea 



321 



Usnea longissima Ach. 



In color this species suggests the last rather than dasypoga 

 diXid plic at a ^ though it fades to a yellowish in herbaria much more 

 quickly than does trichodea. It is the most pendulous species and 

 a length of nearly four meters has been attributed to it.* Though 



Figure C Map showing the distribution of Usnea trUhodea in New England. 



*See Herre, A. W. C. T. Proc. Wash. Acad. Sci. 7 ; 345- IS^^. This length 

 is never attained, so far as I know, in New England, s'm. being the maximum recorded. 



