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Distichium Bruch & Schimp. 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: Bryologia Europaea 2: 153 (fasc. 29–31. Mon. 1.). 1846. (Bryol. Eur.) Name publication detail
 

Project Name Data (Last Modified On 3/5/2009)
Acceptance : Accepted
 

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3. Distichium Bruch & Schimp. in B.S.G.   对叶藓属 dui-ye xian shu
Bryol. Eur. 2: 153 (fasc. 29–30. Mon. 1). 1846.
 

Plants small to large, slender, flattened, green or yellowish green, in dense tufts. Stems erect, often simple, rarely branched, tomentose below; central strand present. Leaves distichous, erect-appressed to erect-spreading, abruptly narrowed from a strongly clasping, oblong-ovate to ovate sheathing base to a short or long, setaceous or subulate acumen, shoulder distinct; margins plane, crenulate above; costa single, stout to rather broad, filling nearly the entire subula; upper (shoulder) cells irregularly quadrate or hexagonal, rather thick-walled, obscure, smooth; basal cells short-rectangular to linear, pellucid, thin-walled. Autoicous or dioicous. Perichaetial leaves similar to the upper stem leaves, but slightly larger. Setae straight, elongate; capsules oblong-ovoid to cylindric, erect, symmetric or inclined and asymmetric, faintly plicate when dry; stomata present; opercula shortly conic-rostrate; annuli differentiated; peristome teeth 16, shortly lanceolate, irregularly divided or perforated, often obliquely striolate or sometimes papillose at the base. Calyptrae cucullate, smooth, entire. Spores spherical, densely papillose.

 

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1. Leaf acumina long, 1–3 times as long as the sheathing base.................................2
1. Leaf acumina short, as long as or shorter than the sheathing base.......................3
2. Plants larger, often 2–8 cm high; capsules erect, cylindric, symmetric; spores 13–24 µm in diameter.............................................................................. 3. D. capillaceum
2. Plants smaller, often 1–2 cm high; capsules inclined, ovoid to oblong-ovoid, asymmetric; spores 39–47 µm in diameter..........................................5. D. inclinatum
3. Basal leaf cells nearly quadrate; leaf acumina about 1/3 as long as the sheathing base.............................................................................. 2. D. bryoxiphioidium
3. Basal leaf cells rectangular; leaf acumina about ½ or as long as the sheathing base........................................ 4
4. Plants larger, (1–)1.5–2.5 cm high; basal cells linear-rectangular, 26–50 µm long; setae often longer than 3 mm, to 10 mm long.................................1. D. brevisetum
4. Plants smaller, 0.5–1.0 cm high; basal cells short-rectangular, less than 25 µm long; setae about 3–4 mm long.........................................................4. D. hagenii

 

 
 
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