Plants small, erect, gregarious. Stems with [or without] central strand. Leaves spathulate, [ovate, oblong, lingulate,] erect spreading when moist, crisped when dry, acute, 1-costate, costa vanishing before apex [minutely excurrent]; laminal cells smooth [papillose], thin-walled, rectangular in proximal half, short-rectangular to isodiametric distally; alar cells not differentiated. Specialized asexual reproduction present [or absent] as multicellular gemmae, 1- to 2-seriate, to 7 cells in length, borne on surface of leaves. Sexual condition autoicous; perichaetial leaves differentiated [or not]. [Sporophytes solitary in perichaetia. Seta erect, straight or twisted when dry, curved when moist. Capsule immersed to exserted, ribbed, rarely smooth; annulus differentiated or not; endostome teeth fused or not; inner peristomial layer of only 8 or 16 cells, or endostome absent. Calyptra cucullate, smooth or papillose, glabrous. Spores striate, pitted or papillose]. SELECTED REFERENCES Crum, H. A. 1994. Rhachitheciaceae. In: A. J. Sharp et al., eds. The moss flora of Mexico. Mem. New York Bot. Gard. 69: 588-590. Goffinet, B. 1997. The Rhachitheciaceae: Revised generic circumscription and ordinal affinities. Bryologist 100: 425-439. Zander, R. H., 1978, Tortula propagulosa of the United States is Rhachithecium perpusillum. Bryologist 81: 458-460. SELECTED REFERENCES Crum, H. A. 1994. Rhachitheciaceae. In: A. J. Sharp et al., eds. The moss flora of Mexico. Mem. New York Bot. Gard. 69: 588-590. Goffinet, B. 1997. The Rhachitheciaceae: Revised generic circumscription and ordinal affinities. Bryologist 100: 425-439. Zander, R. H., 1978, Tortula propagulosa of the United States is Rhachithecium perpusillum. Bryologist 81: 458-460. Plants small, erect, gregarious. Stems with [or without] central strand. Leaves spathulate, [ovate, oblong, lingulate,] erect spreading when moist, crisped when dry, acute, 1-costate, costa vanishing before apex [minutely excurrent]; laminal cells smooth [papillose], thin-walled, rectangular in proximal half, short-rectangular to isodiametric distally; alar cells not differentiated. Specialized asexual reproduction present [or absent] as multicellular gemmae, 1- to 2-seriate, to 7 cells in length, borne on surface of leaves. Sexual condition autoicous; perichaetial leaves differentiated [or not]. [Sporophytes solitary in perichaetia. Seta erect, straight or twisted when dry, curved when moist. Capsule immersed to exserted, ribbed, rarely smooth; annulus differentiated or not; endostome teeth fused or not; inner peristomial layer of only 8 or 16 cells, or endostome absent. Calyptra cucullate, smooth or papillose, glabrous. Spores striate, pitted or papillose].General Information
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Flora of North America @ efloras.org
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