140 The Ottawa Naturalist. - [Nov. 



16. Hypnum (Campylium) obsoletinerve. 



Leaves very small (as in H. Halleri) and crowded, falcate 

 but not circinnate, neither striate nor recurved, entire, not de- 

 current; insertion often yellowish; cells small and narrow. 

 Stem-leaves from ovate-oblong; base abruptl}^ tapering to a 

 shorter acumen; nearly all cells narrow, the angular sometimes 

 suboblong, but special alar cells not defined; costa simple, short 

 and mostly obsolete. Branch-leaves smaller with subovate base, 

 nerveless; all cells narrow. Perichetial leaves hyaline, simply 

 but very faintly costate. Tufts dense and not glossy, brownish 

 below, green above. Stem thin, irregularly divided. Dioecious. 

 Capsules not seen. 



Resembles in habit Hypnum depressulum, C. Muell. 



On earth in swampy soil at Laggan, Alta., altitude 5,500 

 feet, June 28th, 1904. No. 163. 



17. Hypnum Kneiffii, Schimper, *. micropterum. 



Leaves short-decurrent with a few dilated cells below the 

 insertion, alar cells small or indistinct; other cells narrow 

 linear. Habit of H. vernicosum. Otherwise as H. Kneiffii. 

 Capsules not seen. 



On wet earth, Yoho Valley, west slope of Rocky Mountains, 

 B.C., September, 3rd, 1904. No. 296. 



18. PsiLOPiLUM tschutschicum (C. M.) Kindb. 



Capsule narrow subcylindric and slightly curved, finally 

 blackish, longer than in Psilopilum IcevigaHim (Wahlenb.) 

 Limpr. Peristome finally fuscescent. Spores 0, 020-0, 025 mm. 

 Basal leaf-cells very large. 



A common species on clay banks of Hunker and Bonanza 

 Creeks, in July, 1902. In fine fruit late in July on Hunker 

 Creek, Yukon. 



19. Polytrichum apiculatum. 



Differs from our allied species in the minutely apiculate lid 

 of the capsule. Leaves rigid, short-acuminate acute, nearly plane 

 below the middle; apical cells of lamellae papillate, awn red and 

 rough, Perichetial leaves hyaline; costa brown. Capsule narrow 

 4-angled with distinct apophysis; pedicel 3-5 cm. long. Stem 

 simple, scarcely 1 cm. high. 



Along Molar Creek, eastern slope of Rocky Mountains, Alta., 

 altitude 6,500 feet, July 8th, 1904. No. 96. 



20. Fissidens osmundoides, var. obliquus. 



Capsule asymmetric; pedicel 6-8 mm. Leaves generally 

 opaque. Stem without rhizoids. 



Growing on old stumps and earth and roots where floods 



