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!!Mnium Hedw. 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
 

Published In: Species Muscorum Frondosorum 188–197, pl. 45. 1801. (Sp. Musc. Frond.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 3/18/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/18/2009)
General Reference:

Notes     (Last Modified On 3/18/2009)
general taxon notes:
The genus consists of some 12 well-understood species in the world (Crosby et al. 2000). Nine species are recognized in China.

 

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3. Mnium Hedw.   提灯藓属   ti deng xian shu
Sp. Musc. Frond. 188. 1801. Bryum sect. Mnium (Hedw.) Arnott, Mém. Soc. Linn. Paris 5: 278. 1827.
 
Plants slender, small, medium-sized to rather large, pale green to deep green with reddish color, often compact or in loose tufts. Stems erect, simple, rarely branched, with rhizoids at base. Leaves scale-like on the lower part of stems, becoming larger and forming rosettes toward the apex, oblong-ovate to ovate-lanceolate, twisted or crisped when dry, spreading when moist; margins often bordered by one to several rows of narrower and thick-walled cells, single- or double-toothed; costae ending below the apex, percurrent to shortly excurrent; leaf cells mostly pentagonal to hexagonal, rarely quadrate or shortly rectangular, sometimes rounded, with walls often thickened at corners. Dioicous, rarely autoicous. Setae solitary, rarely clustered, elongate, thick, orange; capsules inclined to pendulous, rarely erect, usually elongate-ovoid, sometimes curved; opercula conic, rostrate; peristome double; exostome teeth reddish brown, lanceolate; endostome segments as long as the teeth, orange-red, lanceolate, often split; basal membrane high, ca. 1/2 the height of segments; cilia well developed, often nodulose. Spores large, green or yellow, roughened or coarsely papillose.
 
 

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1. Leaf margins not bordered...................................................................8. M. stellare
1. Leaf margins distinctly bordered................................................................................2
2. Dorsal surface of costae with numerous sharp teeth..........................................................3
2. Dorsal surface of costae smooth or with a few small, blunt teeth..................................6
3. Costae usually percurrent or shortly excurrent..............................................................4
3. Costae ending clearly below the leaf apex or sometimes nearly percurrent.................... 5
4. Stems up to 5.0–6.0 cm long; leaf cells more or less rectangular, in diagonal rows............ 6. M. spinosum
4. Stems ca. 1.0–2.0 cm long; leaf cells more or less quadrate, not in diagonal rows.............. 9. M. thomsonii
5. Costae clearly ending below the apex; median leaf cells quadrate or hexagonal; cells walls not thickened at .
corners........................................................................2. M. hornum
5. Costae nearly percurrent; median leaf cells rounded-ovate or elliptical; cells walls thickened at corners.......
...................................................................................4. M. lycopodioides
6. Leaves hardly crisped when dry; leaf cells scarcely collenchymatous, uniformly thick-walled................... 7
6. Leaves distinctly crisped when dry; leaf cells collenchymatous.........................................8
7. Stems to 1.0 cm long; leaves oblong-lanceolate; plants dioicous......................1. M. heterophyllum
7. Stems to 2.0–3.0 cm long; leaves elliptical or orbicular; plants synoicous..............7. M. spinulosum
8. Leaf cells nearly rounded, 20–25 µm wide, irregularly arranged; dioicous......................... 3. M. laevinerve
8. Leaf cells rounded-quadrate, ca. 17 µm wide, regularly arranged; usually synoicous....... 5. M. marginatum
 
 
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