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49. RhTnchostefirium Bryol. eur. 



I. Eu-Bhyncliosteginni. Stem with broad paraphyllia. Leaves 

 nearlj' flat; eosta short double or indistinct. Dioecious or 

 monoecious. 



II. Psend-Enrhynchinm. Leaves often concave; costa gen. 

 simple or in some leaves indistinct. Often monoecious. Para- 

 phj'Uia us. wanting, in iJ. serrulatum sometimes present. 



I. Eu-Rhynchostegium. 



A. Leaves more or le.ss distant, not decurrent; alar cells not 

 large or not well-defined. R. fruiting. 

 1 .R-depressum Bruch. 



Leaves narrowly ovate-oblong acute sometimes short-acuminate, 

 serrulate above, nearly entire below; upper cells oval-oblong, 

 middle oblong-lanceolate. Capsule suboval or arcuate strangu- 

 late; annulus double; lid rostrate; pedicel short. Stem creeping. 

 Tufts glos.ey green. Dioecious. — Shady rocks. Eur. not com- 

 mon. Sweden, Germany, Switzerl.! 

 2.R.geophilnm Austin; Sullivant icon, muscor. 



Differs from the last: Leaves somewhat larger and more 

 distant, subobtusate, denticulate below; uppermost cells oval, 

 lower lanceolate. Capsule not strangulate; annulus simple. 

 Branches longer; stem nearly eradiculose. — Clayey shaded 

 ground r. AriKr. U. S.: Austin, com. Macoun. 

 S.R.deplanatnm Schimper. — Hypnum Sch.; Sulliv. ic. m.; 

 Rhynchostegium Kindb.; Hypnum (Rhynchostegium) Lq. et J. 



Leaves ovate oblong acute with short or more prolonged su- 

 bulate acumen, serrulate above, minutely denticulate or nearly 

 entire below, cells gen. linear-lanceolate, lower sometimes sub- 

 oblong; costa often obsolete, sometimes double. Perichetial 

 leaves with dentate loner-subulate acumen. Capsule oval-oblong 

 or arcuate, strangulate wide-mouthed plicate when dry; seg- 

 ments entire; lid rostrate, roetellate or obtuse; annulus none; 

 pedicel often short. Stem depressed creeping; paraphyllia us. 

 dentate. Tufts dense dossy green. Us. monoecious. Leaves 

 often crowded. — On rocks or on liase of trees. Amer. Can.: 

 Macoun; Moser. — Male flowers not found by Sullivant. 

 4.R.caloosieiisp Austin. — Hypnum .\ustin. 



»Dift'ers from the last in short pointed entire leaves and 

 much longer entire paraphyllia. — Leaves broadly obliquely 

 ovate subacuminate; areolation loose rhomboidal fusiform; costa 

 geminate distinct to near middle. Capsule broadly oval much 

 constricted; pedicel short. Monoecious. — Amer. r. U. S.: J. D. 

 Smith, Austins: Lesq. et Jam. 



