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Rh BARTRAMIA RADICALIS, Beauv. Tab. 52. molles, laxiuscule pulvinantes, glauco- vel luteo-virides, inferne fuscescentes et toto fere longitudine tomento ferru gineo intertextæ.

breviusculus, e basi decumbente ascendens, sub apice fertili verticillato-ramulosus.

erecto-patentia et subsecunda, lineali-lanceolata, longius cuspidata, argute serrata, solum superiore pagina papillosa; costa sub vel ultra apicem producta: perichæti alia late ovata, subito setacea.

monoici: masculi gemmacei, femineis approximati; perigonialibus e basi valde coucava longe subulata; antheridiis elongatis; paraphysibus longioribus subclavasformibus.

in pedicello longo tenui flexuoso subhorizontalis, globosa; operculo minuto convexo-apiculato; peristomii dentibus lineali-lanceolatis in subulam productis rufo-auranteis, processibus luteis longitrorsum moniliformi-striolatis hic illic pertusis, ciliolis binis brevibus interjectis; sporis papillosis.

On the ground in wet, springy places, margins of swamps, &c, Southern States.—Not uncommon.

B. radicalis is very near the European B. rigida, whose place in this country it seems to supply. The latter species, however, has a less linear leaf, papillose on the lower surface only and refiexed on the margins, a thicker and shorter pedicel, and an oblong-globose capsule with a thicker exterior membrane.