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Hylocomiaceae M. Fleisch. Search in NYBG Virtual HerbariumSearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Published In: Nova Guinea 12(2): 125. 1914. (Nova Guinea) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 9/16/2009)
Acceptance : Accepted
Project Data     (Last Modified On 10/8/2017)
Plant Category: Mosses
General Reference:
Tropicos Lookup Reference:

Notes     (Last Modified On 10/8/2017)
The Hylocomiaceae contain 12 genera and some 26 species distributed worldwide but largely of the north temperate regions; in the Neotropics three genera and four species. In the tropical Andes all genera are found in high open montane and páramo or humid puna. Rhytidium is sometime placed in the Hylocomiaceae; in this treatment it is placed in its own family, Rhytidiaceae. The latest classification by Goffinet et al. (2009) accept 16 genera for the Hylocomiaceae.
Hylocomiaceae contiene 12 géneros y unas 26 especies distribuidas en todo el mundo pero principalmente en regiones templadas del hemisferio norte; en el Neotrópico tres géneros y cuatro especies. En los Andes tropicales todos los géneros se encuentran en el montano alto abierto y páramo o puna húmeda. Rhytidium a veces es ubicado en Hylocomiaceae; en este tratamiento está localizado en su propia familia, Rhytidiaceae.


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Plants medium sized to large and robust, forming loose to dense mats or tufts. Stems spreading to ascending or erect, rarely subpendent, regularly to irregularly pinnately branched; in cross-section central strand present or absent; paraphyllia and pseudoparaphyllia present or absent. Leaves erect to wide spreading, falcate or not, oblong-lanceolate or broadly ovate to nearly oval, concave, plicate, smooth or somewhat plicate, apex broadly acute to rounded or gradually to abruptly acuminate, base cordate-auriculate or not; margins plane or recurved, entire to serrate or serrulate; costae double, 1/4-1/3(-1/2) lamina length or single; laminal cells, medium cells oblong-linear, fusiform or linear, weakly porose or not; lower and basal cells elongate, strongly porose; alar cells differentiated or not. Dioicous. Perichaetia lateral. Setae elongate, smooth. Capsules erect to inclined or horizontal, urn ovoid-cylindrical to ellipsoid, ± curved and asymmetric; opercula conic to conic-apiculate or rostrate and oblique; peristome double, exostome teeth 16, smooth or cross-striate below, distally papillose, trabeculate on back; endostome lightly papillose, basal membrane high, segments 16, keeled and perforate, cilia 1-3, or absent to rudimentary. Calyptrae cucullate, naked and smooth. Spores spherical, finely papillose.
Plantas pequeñas a grandes y robustas, formando tapices o manojos laxos a densos. Tallos extendidos a ascendentes o erectos, raramente subpéndulos, regular a irregularmente pinnados; cordón central presente o ausente en sección transversal; paráfilos y pseudoparáfilos presentes o ausentes. Hojas erectas a amplio extendidas, falcadas o no, oblongo-lanceoladas o anchamente lanceoladas a caso ovales, cóncavas, plicadas, lisas o rugosas, ápice anchamente agudo a redondeado o gradualmente a abruptamente acuminado, base cordado-auriculada o no; márgenes planos o recurvados, enteros a aserrados o serrulados; costa doble, 1/4-1/3(-1/2) del largo de la lámina o simple; células de la lámina, células mediales oblongo-lineales, fusiformes o lineales, débilmente porosas o no; células inferiores y basales elongadas, fuertemente porosas; células alares diferenciadas o no. Dioicas. Periquecios laterales. Setas elongadas, lisas. Cápsulas erectas a inclinadas u horizontales, urna ovoide-cilíndrica a elipsoide, ± curvada y asimétrica; opérculo cónico a cónico-apiculado o rostrado y oblicuo; peristoma doble, dientes del exostoma 16, lisos o estriados transversalmente abajo, papilosos distalmente, trabeculados dorsalmente; endostoma ligeramente papiloso, membrana basal alta segmentos 16, plegados y perforados, cilios 1-3, o ausentes a rudimentarios. Caliptra cuculada, desnuda y lisa. Esporas esféricas, finamente papilosas.

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1. Stem leaves ovate, apices acute-rounded; margins entire; paraphyllia absent … Pleurozium
1. Stem leaves oval to broadly ovate, nearly as broad as long, apices abruptly short to long acuminate; margins serrate; paraphyllia present … Loeskeobryum
1. Hojas del tallo ovadas, ápice agudo-redondeados; márgenes enteros; paráfilos ausentes … Pleurozium
1. Hojas del tallo ovales a anchamente ovadas, casi tan anchas como largas, ápices abruptamente corto a largo acuminados; márgenes aserrados; paráfilos presentes … Loeskeobryum
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