— 6-2 — 



short black cilia on the under margins. Toward the middle it is well cov- 

 ered with gray soredia forming usually a powdery crust: apothecia are rare. 

 This attractive lichen is found on trees and rocks, the finest specimens on 

 the latter; it is common in the Eastern States. Although semi-crustaceous, 

 in damp weather it can be collected readily if growing on rock ; that on trees 

 must be taken with the bark. ^. 



SELIQERIA TRISTICHOIDES KINDB. 



This species is described in Rev. Brj^oh, 1896, p. 20, as follows: 

 " Leaves broader than in Seligeria tristicha-. costa not distinctly excur- 

 rent. Perichsetial leaves abruptly narrowed; costa percurrent or short-ex- 

 current. 



Norway, northern district. Arnell and Schlegel: E. Nyman." 



In his " Species of European and North American Bryinese," part 2, pub- 

 lished in 1897, the author, on p. 213, ranks his new species with " 5. iristicha 

 Bridel," [which should be .S". iristicha (Brid.) B. S.] under " Capsule piriform, 

 with straight pedicel." Trusting implicitly in this characterization as correct, 

 I never suspected that the Schlegel and Arnell plant in my hands, and re- 

 ferred to in the January, 1902, Bryologist, p. 7, in connection with the plant 

 collected by Dr. G. G. Kennedy in Vermont (not in " Connecticut,' as stated 

 erroneously then), could hQ the type — as it appears to be from several consid- 

 erations — of Dr. Kindberg's S. tristichoides. For this Norwegian plant has 

 not "capsule piriform," nor "straight pedicel." The Vermont plant, as I 

 have endeavored to set forth in my note and drawings, agrees essentially 

 with the Norwegian plant, having the capsule ke?nispkerical, as shown, and 

 the seta curved, as stated. Thanks to the generosity of Mr. H. N. Dixon, 

 who shared with me his specimen of this Norwegian plant collected by Dr. I. 

 Hagen in 1896, I have been able to make another minute comparison, which 

 tends to confirm my view as to the specific identity of the two plants. This 

 is the more important since to Dr. Hagen, the collector, belongs the credit of 

 describing for the first time adequately Kindberg's Seligeria tristichoides 

 (in Musci Norvegise Borealis, part I. p. 32, 1899) so that it may hereafter be 

 recognized. 



Dr. Hagen's statements at the end of his description are of sufficiently 

 general interest to be quoted in full. He says: " This species is the same 

 as has passed since Sommerfelt for S. iristicha; neither the author of Bry. 

 Eur. nor Lindberg in his ' Utredning af de Skandinaviska Seligerife' have 

 separated it from this species, which is not strange, in view of the scant 

 material available at the time. In 1894 I recognized it as a good new species 

 and have since distributed it frequently as S. uncula, although I had a sus- 

 picion that the S. tristichoides mentioned by Kindberg in Rev. Bryol., 1896 

 and in Bot. Not might be identical with it. But the descriptions given there 

 were so incomplete that his species could not be distinguished from S. cal- 

 carea, wherefore I ignored his name. It is only at the place above cited 

 (Bot. Not.) that he has given a diagnosis which, while still very incomplete, 



