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Rh TRICHOSTOMUM VAGINANS, Sulliv.

Tab. 28.

elatiusculæ, gracillimæ, in caispites superne flavo-virides confertæ.

subuncialis, innovationibus longis erectis tenuibus ramosus.

caulina ramulinaque minuta, erecto-appressa, anguste oblongo-lanceolata, comalia majora longius acuminata; perichætialia longe vaginantia, subito breviter acuminata; omnia costa latissima cum apice obtusiuscula desinente, marginibus planis integerrimis, retique e cellulis inferne oblongis superne subquadratis conflato prsedita.

dioici: plantæ masculæ femineis similes; floribus terminalibus subcapituliforraibus; antheridiis elongatis paraphysatis.

cylindraceo-oblonga, regularis, pedicello longissimo pertenui elata; peristomii dentibus sedecem dilute flavescentibus lævibus (nee granulatis) 8–10-nodoso-articulatis integris subfissis vel vario modo pertusis, membrana basilari omnino nulla; annulo latissimo composito; operculo conico breviter obtuse rostrato.

Clayey and sandy soil, from New Jersey to Missouri.

This species resembles both T. tortile and T. tenue; but these have a much narrower annulus (simple in T. tortile), and the teeth of their peristome are strongly papillose or granular on