. Manual of the mosses of North America [microform]. Mosses; Mousses. t:ry\ceje. Calyptra sinoitli. Peristomo double. Teeth iiarrowly lanceolate-subulate; seair:!iits shorter than the teeth, subulate; basilar membrane none. 85 111. Antitrichia. Trihk XIX. ITOOKERIE/E. Plants small, soft, liypnoiil; areoktion lar^e. Calyptra conical-mitrate. Teristome double. Leaves bicostate, often margined, more or less distinctly serrate. 112. Hookeria. Leaves plane, largi", very obtuse, not costate; areolation very large. 113. Pterygophyllum. TiMiJK XX. FATJROXIEyE. Plants very small. Leaves thin, deli
. Manual of the mosses of North America [microform]. Mosses; Mousses. t:ry\ceje. Calyptra sinoitli. Peristomo double. Teeth iiarrowly lanceolate-subulate; seair:!iits shorter than the teeth, subulate; basilar membrane none. 85 111. Antitrichia. Trihk XIX. ITOOKERIE/E. Plants small, soft, liypnoiil; areoktion lar^e. Calyptra conical-mitrate. Teristome double. Leaves bicostate, often margined, more or less distinctly serrate. 112. Hookeria. Leaves plane, largi", very obtuse, not costate; areolation very large. 113. Pterygophyllum. TiMiJK XX. FATJROXIEyE. Plants very small. Leaves thin, delicate, ciliate-ilenlate or entire. Capsme pyrifoi'm, with a distinct colhim. Calyptra cucullate, split on one side. Peristonie simple or none. Leaves delicate, not costate, dentate-ciliate. Calyptra thin. Plants more robnst. Leaves entire, thinly costate to the middle. Peristome double; segments shorter than the teeth. Plants very small. Leaves sqnarrose when moist, entire. Peristome simple. Plants minute. Leaves minut(dy serrulate above, ('apsule thin, constricted under the orilice. Teeth of the simple peristome very irregular. 114. Fabronia. 115. Anacamptodon. 110. Habrodon. 117. Clasmatodon. Tkibe XXL ^. Priinary stems creeping. Leaves soft, areoliition minute, hexagonal, papillose and chloropliyllose above, hexagonal-rectangular below. C'apsule synnnetrical, erect or ciuved. Peristome double; teeth linear-lanceolate, subulate; segments shorter than the teeth; cilia none or rudimentary, rarely perfec*;. Plants glaucous yellow. Leaves pellucid; C"!ls conspicuously papillose. Capsule cy- lin liical, erect; membrane broad, cariuate, \ ^l Hit segments. 15i:i:;'iic julaceous. Leaves glaucous green, clos â > ind)ricate. Capsule suberect, long- pediei'llat(>, inllated at the collum. Peri- stome double, perfect. Plants small. Leaves soft, costate, papillose on both faces (except in one species). Cap- sule oblong, erect or subarcuate, thin. Seg- ments of the per
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