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Ditrichaceae Limpr. Search in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Die Laubmoose Deutschlands, Oesterreichs und der Schweiz 1: 482. 1887. (Laubm. Deutschl.) Name publication detail
 

Project Name Data (Last Modified On 2/20/2009)
Acceptance : Accepted
 

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DITRICHACEAE
牛毛藓科 niu-mao xian ke
by Cao Tong and Si He
 
Plants mostly minute to small, or at times to medium-sized, gregarious or in loose tufts, sometimes densely caespitose. Stems erect, simple or branched; central strand present or poorly developed or absent. Leaves usually lanceolate, acuminate or subulate, sometimes sheathing at base, seldom distichous; margins plane, reflexed or revolute, entire or serrulate; costa single, narrow, subpercurrent to long-excurrent; cells subquadrate or short-rectangular to linear, mostly smooth or occasionally mammillose; alar cells not differentiated. Sporophytes terminal; setae usually elongate, straight, sometimes very short; capsules often long-exserted, at times immersed to emergent, subglobose to cylindric, erect to inclined or curved, asymmetric; opercula often differentiated, conic or long-rostrate, sometimes absent; annuli mostly differentiated; stomata absent or present; peristome none or present with 16 teeth, divided in terete division or perforated nearly to the base, without vertical pitted-striolation or with oblique striolation. Calyptrae cucullate, rarely mitrate. Spores small, spherical, minutely papillose.
 

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1. Plants strongly flattened; leaves distichous or 3-ranked..........................................2
1. Plants rounded; leaves neither distichous nor 3-ranked..........................................3
2. Peristome teeth present; leaves with a distinct sheathing base................3. Distichium
2. Peristome teeth absent; leaves without a sheathing base....................11. Tristichium
3. Upper leaf cells quadrate or nearly so; capsules furrowed when dry.....................4
3. Upper leaf cells rectangular; capsules smooth when dry....................................5
4. Leaf margins reflexed or revolute, always unistratose; capsules deeply furrowed, strumose at base; plants yellowish green...............................................2. Ceratodon
4. Leaf margins plane, sometimes bistratose above; capsules not deeply furrowed and not strumose at base; plants yellowish green with bluish sheen..................9. Saelania
5. Setae very short; capsules immersed or emergent............................................. 6
5. Setae elongate; capsules exserted.....................................................................9
6. Opercula not differentiated................................................................ 7. Pleuridium
6. Opercula differentiated...............................................................................7
7. Peristome teeth present; leaves lanceolate........................................... 6. Garckea
7. Peristome teeth absent; leaves oval or ovate.................................................. 8
8. Leafy stems julaceous, glossy; leaf apices rounded or obtuse; calyptrae cucullate............................... 1. Astomiopsis
8. Leafy stems not julaceous and lusterless; leaf apices broadly acute or apiculate; calyptrae mitrate.........................8. Pringleella
9. Leaves distinctly sheathing at base, spreading and crispate when dry............................................................. 10. Trichodon
9. Leaves not particularly sheathing at base, appressed and erect when dry...........10
10. Peristome teeth absent.........................................................4. Ditrichopsis
10. Peristome teeth present, normal................................................5. Ditrichum

 

 
 
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