Plantæ minutulæ, deprcsso- et implexo-cæspitantes, colore viridi in luteo-variegatum vergente.

Caulis uncialis et ultra, parce divisus, valde papillosus, breviter bipinnato-ramulosus; ramis ramulisque tenuissimis.

Folia heteromorpha, caulina niulto majora, distantia, late deltoidea, subdecurrentia, longius capillari-acuminata, patentissima, ramorum et ramulorum ovato-lanceolata vel elongato-ovata, acutata, erecto-patentia, laxe incumbentia, crassiuscula, opaca, utraque pagina dense papillosa, margine toto papilloso-crenulata; costa valida pellucida infra apicem desinente; rete uniformi e cellulis minutissimis liexagono-rotundis granuloso- -chlorophyllosis exstructo; paraphylliis subnullis: perichætialia sublævia, laxius longiusque areolata, interiora vaginantia, elongato-lanceolata, tenuiter acuminata, costata, superne leniter serrulata.

Flores monoici, cauligeni: masculi gemmacei; perigonialibus ecostatis.

Capsula altius pedicellata, brevi-oblonga, arcuata, inæqui-lateralis, macrostoma; peristomio hypnoideo, dentibus apice flexuoso-filescentibus, ciliolis ternatis brevibus; annulo perfecto conspicuo; opercnlo e basi conica subulirostro; calyptra majuscula.

Hab. Grows in thin close mats, on limestone rocks, in shaded ravines, Central Ohio. Rare.

Very near H. minutulum: distinguished however by its smaller