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Rh PYLAISÆA SUBDENTICULATA, Schimp.

Tab. 87.

tenellæ, depresso- et implexo-caespitantes, sericeo-virides.

repens, divisus, irregulariter subpinnatim ramulosus, ramulis gracilibus expansis vel asccndentibus.

erecto-patentia, baud conferta, ovato-lanceolata, brevius longiusve acuminata, concava, margine lenissime serrulata, ecostata, rhomboideo-elliptico-areolata; cellulis angularibus permultis quadratis subgranulosis: folia perichætialia vagiuantia, elongato-lanceolata, laxe texta, tenuiter acuminata.

monoici; perichætiis aggregatis; perigoniis aperto-gemmaceis; antberidiis et parapbysibus numerosis.

cylindraceo-oblonga, symmetrica, in pedicello rutilante 5–8-lineari erecta; peristomio duplici, dentibus lanceo-lato-subulatis sat longe sub orificio orientibus remotius articulatis, articulis utraque facie adque latera prominulis, ciliis dentibus æquilongis carina'sæpius diremptis e membrana lata plicata ortis, ciliolis subnullis; operculo e basi conica longius rostrato; calyptra dimidiata.

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