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Tetraphidaceae Schimp. Search in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Corollarium Bryologiae Europaeae 37. 1856. (Coroll. Bryol. Eur.) Name publication detail
 

Project Name Data (Last Modified On 2/20/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/17/2009)
General Reference:

Notes     (Last Modified On 3/17/2009)
general taxon notes:

 

The Tetraphidaceae are nearly circumboreal in distribution, consisting of two genera, Tetraphis Hedw. and Tetrodontium Schwaegr. Species of the Tetraphidaceae, especially those of Tetraphis, usually occur in northeastern, northern, and northwestern China, but they are found from high mountain forests in southwestern China and Taiwan. The habitats are usually on rotten wood or stumps, rocks or shady undercover boulders. The genus Tetrodontium was only recently reported from China (Vitt & T. Cao 1989).

 

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TETRAPHIDACEAE
四齿藓科   si-chi xian ke
by Li Xing-jiang, Si He, and Zhang Da-cheng
 
 
Plants minute to small, slender, bright green, dark green or reddish brown, not glossy, gregarious or in dense tufts. Protonemata filamentous, ephemeral or leaf-like (flaps) and persistent, forming large patches mixed with stems. Stems erect, usually simple, rarely branched. Leaves sparse, erect-spreading, usually arranged in 3–5 ranks, broadly ovate to ovate-lanceolate or oblong-lanceolate, acute to acuminate at apex; margins entire or bluntly denticulate, not bordered; costa single, reaching above the middle or ending below the apex, sometimes weak or rarely lacking; leaf cells unistratose, smooth, upper and median cells green, rounded-hexagonal or irregularly rhombic to oblong-rhomboidal; lower cells elongate. Autoicous. Perigonia rosulate with numerous paraphyses. Perichaetia budlike, without paraphyses; perichaetial leaves larger than stem leaves. Setae elongate, slender, erect; capsules cylindrical or ovoid-cylindrical, erect, symmetric or nearly so, smooth; opercula conic; annuli absent; peristome nematodontous, consisting of whole cells, four in number, narrowly triangular, inserted below the mouth; columella disconnected to opercula. Calyptrae long-mitrate, usually plicate, naked, deeply lobed at base. Spores spherical, smooth to finely roughened.
 

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1. Plants 8–18 mm high, tufted; leaves numerous; costa strong; upper leaf cells rounded-hexagonal; capsules cylindrical; calyptrae long-conic, plicate; gemmae cups usually present......................................... 1. Tetraphis
1. Plants only 1.5–3.0 mm high, scattered; leaves few; costa weak, sometimes very short or lacking; capsules ovoid-cylindrical; calyptrae conic, not plicate, deeply lobed at base; gemmae cups absent.... 2. Tetrodontium
 
 
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