IOONBS MUSCORUM. 137 



PYLAIS^EA SUBDENTICULATA, Schimp. 



Tab. 87. 



Plants tenellae, depresso- et implexo-caespitantes, sericeo- 

 virides. 



Caulis repens, divisus, irregulariter subpinnatim ramulosus, 

 ramulis gracilibus expansis vel asccndentibus. 



Folia erecto-patentia, baud conferta, ovato-lanceolata, brevius 

 longiusve acuminata, concava, margine lenissime serrulata, 

 ecostata, rhomboideo-elliptico-areolata ; cellulis angularibus per- 

 multis quadratis subgranulosis : folia perichaetialia vagiuantia, 

 elongato-lanceolata, laxe texta, tenuiter acuminata. 



Flores monoici ; perichaetiis aggregatis ; perigoniis aperto- 



gemmaceis ; antberidiis et parapbysibus numerosis. 



Capsula cylindraceo-oblonga, symmetrica, in pedicello ru- 

 tilante 5-8-lineari erecta ; peristomio duplici, dentibus lanceo- 

 lato-subulatis sat longe sub orificio orientibus remotius articu- 

 latis, articulis utraque facie adque latera prominulis, ciliis 

 dentibus aequilongis carina ssepius diremptis e membrana lata 

 plicata ortis, ciliolis subnullis ; operculo e basi conica longius 

 rostrato ; calyptra dimidiata. 



Pylais^ea subdenticulata, Schimp. in Bryol. Europ. ; Sulliv. Mosses U. 

 States, p. 62. 



Hab. On the bark of trees, Central Ohio ; rare. New Jersey, 

 Austin. 



Very near slender forms of P. polyantha ; distinguished by 

 scarcely any other characters than its shorter-pointed leaves and 

 longer rostrate operculum ; and there may be a doubt, since but 



