THE PLANTS OF THE PRIBILOF ISLANDS. 579 



Bryum obtusifolium, Linilb. 



St. Paul Island. (Paluier.) 



Bryuni erythrophylluni, Kindb. 



St. Paul Island. (Palmer.) 



Mniuni subglobosum, Br. and iSch. 



St. Paul Island. (Dr. Meniam.) 

 Psilopilum arcticum, Brid. 



Common on earth on St. Paul Island. (J. M. Macoun; Palmer.) 



Pogonatum dentatum, Brid. 



On earth, St. Paul Island. (J. M. Macoun.) 



Pogonatum alpinum, Roehl. 



On earth and rocks, St. Paul Island. (Dr. Merriam; Palmer; J. M. Macoun.) 

 Pogonatum alpinum, Eoelil. var. septentrionale, Brid. 



On rocks, St. Paul and St. George islands. (J. M. Macoun.) 

 Pogonatum alpinum, Roehl. var. microdontium, Kindb. 



Separated from the species by its nearly entire or indistinctly denticulate leaves. 



St. Paul Island. (Palmer; J. M. Macoun.) 



Polytrichum striatum, Banks. 



St. Paul Island. (Dr. Merriam.) Perhaps the next. 

 Polytrichum boreale, Kindb. 



Differing from the nearly allied P. hyperhoreimi principally in the leaves being 

 distinctly dentate above; the apex hyaline in the upper part, red in the lower. 



St. Paul Island. (J. M. Macoun.) 



Braohythecium albicans, Br. and Sch. 



St. Paul Island. (Palmer.) 



Braohythecium rivulare, Br. and Sch. 



St. Paul Island. (Dr. Merriam.) 

 Eurhynchium vaucheri, (Schiuip.;. 



On rocks, St. George Island. (J. M. Macoun.) 

 Plagiothecium pulchellum, Br. and Scb. 



On other moss. St. Paul Island. (J. M. Macoun.) 

 Hypnum uncinatum, Hedw. 



St. Paul Island. (J. M. Macoun.) 

 Calliergon cordifolium, Hedw. 



St. Paul Island, (J. M. Macoun.) 

 Hylocomium splendens, Schimp. 



St. Paul Island. (Dr. Merriam; Palmer.) 

 Hylocomium alaskanum, Schimp. 



St. Paul Island. (J. M. Macouu.) 

 Hylocomium squarrosum, Schimp. 



St. Paul Island. (Dr. Merriam; Palmer; J. M. Macoun.) 



