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Zygodon Hook. & Taylor Search in The Plant ListSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Publicado en: Muscologia Britannica 70–71, pl. 3 [upper left], 21 [upper left]. 1818. (Muscol. Brit.) Name publication detail
 

Datos del Proyecto Nombre (Last Modified On 12/15/2011)
Aceptación : Accepted
Notas     (Last Modified On 12/13/2011)
general taxon notes:
There are some 91 species of Zygodon in the world (Crosby et al. 2000), with the majority of the species distributed in South America. Five species are known in China.

 

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9. Zygodon Hook. & Taylor   变齿藓属   bian chi xian shu
Muscol. Brit. 70. 1818. Zygodon sect. Zygodon (Hook. & Taylor) Müll. Hal., Linnaea 18: 670. 1845.
 
Plants slender, green, yellowish green or dark brown, in loose or dense mats. Stems erect- or spirally ascending, simple or branched, with dense reddish rhizoids. Leaves appressed, often twisted or contorted when dry, erect-spreading or recurved to squarrose when moist, mostly lanceolate to elongate-lanceolate, long acuminate, or elongate-lingulate, obtuse; margins plane, entire or dentate near the apex; costae strong, subpercurrent, rarely shortly excurrent; upper leaf cells rounded-hexagonal, thick-walled, unipapillose, or smooth; lower cells gradually elongate, rectangular, hyaline. Gemmae often present on stems or leaves. Dioicous or autoicous. Perichaetial leaves not differentiated. Setae elongate; capsules oblong-ovoid, constricted at the mouth, clearly plicate or furrowed, apohyses present; opercula conic, usually long-rostrate; annuli differentiated, often persistent; peristome double, single (only endostome present) or absent; exostome teeth 16, partially or completely united in 8 pairs, densely papillose above, trabeculate on the outer surface, striolate with dense papillae at base; endostome segments 8 or 16. Calyptrae small, cucullate, deciduous, usually smooth, rarely hairy. Spores spherical, papillose.
 
 

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1. Leaves broadly obtuse at the apex............................................................................................... 2. Z. obtusifolius
1. Leaves acute or apiculate at the apex...................................................................................................................... 2
2. Leaf margins irregularly dentate at the apex............................................................................ 3. Z. reinwardtii
2. Leaf margins entire throughout........................................................................................................................... 3
3. Leaves ovate-lanceolate, shortly blunt or apiculate at the apex................................................... 1. Z. brevisetus
3. Leaves narrowly lanceolate, acuminate at the apex............................................................................................... 4
4. Leaves erect, not or somewhat contorted when dry; gemmae 5–10 cells long, fusiform, ellipsoid, subclavate................................................................................................................................. 4. Z. viridissimus
4. Leaves twisted, flexuose, appressed when dry; gemmae absent........................................ 5. Z. yuennanensis

 
 
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