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Plagiotheciaceae M. Fleisch. Search in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Nova Guinea 8(2): 748. 1912. (Nova Guinea) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 2/20/2009)
Acceptance : Accepted
Project Data     (Last Modified On 4/1/2009)
General Reference:

Notes     (Last Modified On 4/1/2009)
general taxon notes:

 

The Plagiotheciaceae were considered by Brotherus (1907) as a subfamily of the Hypnaceae, with seven genera. Fleischer (1912) elevated it to the family level with six genera. Both Fleischer (1923) and Brotherus (1925) recognized two subfamilies in the Plagiotheciaceae: Plagiothecioideae (Plagiothecium Bruch & Schimp. and Catagonium Müll. Hal. ex Broth.) and Stereophylloideae (Entodontopsis Broth., Pilosium (Müll. Hal.) M. Fleisch., Stenocarpidium Müll. Hal., Stereophyllum Mitt., and Stenocarpidiopsis Broth.). This classification was adopted by P. C. Chen et al. (1978). Several authors have placed Herzogiella Broth., Isopterygium Mitt., Pseudotaxiphyllum Z. Iwats., and Taxiphyllum M. Fleisch. in the Plagiotheciaceae (Iwatsuki 1970, 1987; Lawton 1971; Noguchi 1994; Smith 1978). Buck and Ireland (1985) elevated the Stereophylloideae to the rank of family with six genera mentioned above, and considered the Plagiotheciaceae a monotypic family with Plagiothecium only, which is followed here. Recently, Goffinet and Buck (2004) included Buckiella Ireland and Struckia Müll. Hal. in the Plagiotheciaceae.

 

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Plagiotheciaceae
棉藓科   mian xian ke
by Li Deng-ke and Robert R. Ireland
 
Plants slender to rather robust, green or yellowish green, usually glossy, in loose or dense mats. Stems mostly prostrate, complanate, irregularly branched, sometimes with flagelliform branches; cortical cells large, central strand differentiated or absent; paraphyllia and pseudoparaphyllia absent. Stem and branch leaves similar, broadly ovate, elliptical, or ovate-lanceolate, sometimes concave, obtuse, acute or acuminate at apex; dorsal and ventral leaves mostly symmetric, appressed or erect; lateral leaves often larger, asymmetric; margins entire or serrulate; costae double, forked, unequal, rarely absent; median leaf cells elliptical, rhombic or rhomboidal, all smooth, except in Plagiothecium undulatum (Hedw.) Schimp. with minute, cuticular papillae on abaxial surfaces; alar cells distinctly differentiated, shorter, broader, usually distinctly decurrent, consisting of 1–8 rows of quadrate to rectangular cells. Autoicous or dioicous. Perigonia small, bud-like. Perichaetia on short branches. Inner perichaetial leaves small, erect, acuminate, often sheathing at base. Setae slender, straight or curved, smooth, usually reddish; capsules erect, inclined or horizontal, asymmetric, ovoid, ellipsoidal, or cylindrical; often constricted below the mouth; opercula conic at base, obliquely rostrate; annuli often persistent; peristome double; exostome teeth 16, mostly united at base, lanceolate, cross-striolate below; endostome segments divided, keeled; basal membrane high; cilia developed or absent. Calyptrae cucullate, smooth. Spores spherical, yellowish green, smooth or finely papillose.
 

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Only one genus is found in China.

1. Plagiothecium Bruch & Schimp. in B.S.G.  

 
 
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