—30— 



common in Mexico and Arizona plants." On the basis of Mr. Merrill's material,, 

 and of specimens in my own herbarium (Nos. 886, 888) from Jacksonville it 

 would be well to include Florida in this statement, though Mr. Merrill's remark 

 "intermediate" well describes the Florida specimens as they are certainly 

 atypical of the true tropical variety. 



Usnea plicata (L.) Web. In the same Exsiccati No. 64, Mr. Merrill dis- 

 tributed material from Matinicus Island, Maine, under the synonym Usnea 

 ceratina Ach., and later, No. 130, he distributed material from the same locality 

 under a new form suhplicata. This form was given no diagnosis, and the name 

 must be relegated to the already overburdened synonymy. 



I am recording in the Bull. Torr. Bot. Club, 38: 292. 191 1, the northern 

 "dwarf condition" of this species which has been known as Usnea barbata var. 

 plicata Fr., from the Yukon. Mr. Merrill in his Exsiccati No. 109 distributes 

 the variety as understood by Tuckerman under the name Usnea plicata Ach. 

 from Jamaica. The small specimen that I have examined of the distribution 

 seems to me, however, more probably referable to the trichodea (subnaked apo- 

 thecial) group, though it is slightly papillate, and in Acharius' Usnea jamaicensis 

 he calls the apothecia "ambitu nudo. " Usnea jamaicensis Ach. may prove to 

 be the proper name. It is certainly not the boreal, dwarf plicata (L.) Web. 

 referred to by Tuckerman as the variety plicata of Fries. 



Usnea articulata (L.) Hoffm. Dr. A. C. Herre did not include this species 

 in his first (1906) list of the lichens of Santa Cruz, Cal., but in the more com- 

 plete work of 1910 (Proc. Wash. Acad. Sci. 12: 225. 1910) he lists it as a "not 

 very abundant plant on the mountain forests." I have a fragment of one of 

 his plants collected at Castle Rock Ridge, Santa Cruz (2,500 ft.) which though 

 atypical is referrable to this species. Its range should now include California, 

 and probably Oregon and Washington, north to British Columbia. 



Usnea cavernosa Tuck. In a recent examination of the Alectoria material 

 in the herbarium of the Canadian Geological Survey kindly sent me by Prof. 

 John Macoun, I found a specimen of this species from Frazer Falls, Murray 

 river, Quebec, collected Aug. 11, 1905. 



In Flora 71: 81. 1888, Arnold also included this species from Miquelon 

 Island, Newfoundland, under the synonym microcarpa Arn. 



Usnea angulata Ach. In my former paper I gave the northern range of 

 this species as "about the 43rd parallel" not including the record from Lake 

 Superior, Quebec and Ontario given in Prof. Macoun's Canadian Plants (61 ; 

 1902), as I was not able to see the material on which the record was based. 

 The three specimens have been recently sent me by Prof. Macoun, and are 

 typical examples of Usnea longissima Ach., which leaves the range of the dis- 

 tinctly Austral angulata unchanged. 



During the past winter I collected atypical specimens of this species in a. 

 cedar swamp at Fitzwilliam, N. H., which is just south of the 43rd parallel. 



Thoreau Museum, Concord, Mass. 



