674 MUSCI. (MOSSES.) 



$ 15- HYPNUM PROPER. Stems procumbent or ascending, irregularly divided, 

 with a more or less densely pinnate ramification, sparingly villous: leaves ovate-lan- 

 ceolate, more or less long-acuminate, usually subsecund or falcate-secund, obsoletety 

 licostate, membranaceotis, shining ; cellules linear, compact : capsule annulate, 

 mostly oblong and crect-cernuous : operculum conic, more or less rosicllate. 



46. II. lliolluscillll, Hedw. Dioecious ; grows in soft mats ; stems 

 procumbent cr ascending, diehotomously divided ; the divisions very closely 

 and pinnately ramulose, much as in No. 45; branchlets incurved at their 

 points ; leaves suddenly lanceolate-attenuate from a broad base, falcate-secund, 

 serrate ; capsule horizontal, turgid-oval. On roeks and on the ground, in dense 

 woods ; mostly in mountainous regions. (Eu.) 



47. II. Cllpressiformc, L. Dkeeious ; stems creeping, irregularly or 

 subpinnately ramulose ; leaves broadly oblong-lanceolate, attenuated, often ser- 

 rulate at the point, falcate-secund ; capsule oblong or cylindrical, crect-cernu- 

 ous ; annulus broad ; operculum convex-conic, more or less acutely rostcllate. 

 Hilly districts, on the trunks of trees, rocks, or on the ground, in shaded 

 places. Very variable. (Eu. ) 



48. II. illlpOIlCHS, Hcdw. Dioecious ; stems prostrate, extended, di- 

 vided, regularly and closely pinnate ; leaves broadly ovate-lanceolate, long-acu- 

 minate, falcate-secund, sharply serrate at the point, the margins below reflexcd ; 

 capsule cylindrical, suberect, slightly incurved. On the ground, and on de- 

 cayed logs ; forming extensive thin mats, in localities not mountainous. One 

 of our most common species. (Eu.) 



49. H. reptile, Michx. Monoecious ; stems slender, creeping, elongated, 

 subpinnately ramulose ; leaves ovate-oblong, moderately acuminated, subse- 

 cund, more or less falcate, strongly serrate at the point ; capsule cylindrical, 

 erect-cernuous ; operculum large, rostellate from a tumid base. Smaller than 

 the last ; occurs only in mountainous districts, where it is very common. (Eu.) 



50. H. curvif oliuin, Hedw. Dioecious ; in general aspect like No. 47 

 and 48, but larger, and not so pinnately ramulose ; readily recognized by its 

 large, cernuous, and, when dry, sulcate capsule ; and by the conspicuous whit- 

 ish, plicate, perichaetial leaves. Grows with No. 48. 



51. H. Haldailianum, Grcv. Monoecious; stems creeping, irregu- 

 larly branched ; brandies subcompressed ; leaves ovate-lanceolate and broadly 

 oblong-lanceolate, entire, spreading, more or less secund ; capsule elongated, 

 cylindrical, nearly erect, slightly incurved ; operculum actiFely conic or subros- 

 tellate. Grows in same places as the last. (Eu.) 



52. II. neniOi'OSUlll, Koch. Monoecious ; stems creeping, elongated, 

 with several main divisions, which are closely subpinnately and fasciculately 

 ramulose ; branchlets subcompressed ; leaves ovate-lanceolate, with a long and 

 narrow strongly serrate and subflexuous point, patent, more or less secund ; 

 capsule oblong, erect-incurved ; operculum short-conic. Decayed logs, on 

 summits of the Alleghany Mountains. About the size of No. 48. (Eu.) 



53. H. prate use, Koch. Dioecious (in European specimens pscudo- 

 moncecious, Bryol. Europ.) ; stems ascending, divided, subfastigiately branched; 



