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Oligotrichum DC. 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: Flore Française. Troisième Édition 2: 491. 1805. (Fl. Franç. (ed. 3)) Name publication detail
 

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Notes     (Last Modified On 4/3/2009)
general taxon notes:
There are 27 species of Oligotrichum in the world, and nine taxa are reported from China (Redfearn et al. 1996). Among the nine taxa, Oligotrichum arisatulum Broth., O. hercynicum (Hedw.) Lam. & Cand., and O. semilamellatum var. yunnanense Besch. cannot be confirmed. Six species are treated here.

 


 

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4. Oligotrichum Cand. in Lam. & Cand.   小赤藓属   xiao chi xian shu
Fl. Franc. (ed. 3) 2: 491. 1805. Polytrichum sect. Oligotrichum (Cand.) Arnott, Mém. Soc. Linn. Paris 5: 322. 1827. Polytrichum subgen. Oligotrichum (Cand.) Mont. in Orbigny, Dict. Univ. Hist. Nat. 8: 400. 1849.
 
Plants slender or rarely robust, small to large, yellowish green, brownish green or reddish brown, erect, usually in tufts, rarely gregarious. Stems often with stoloniferous and innovated branches, numerous rhizoids at base; central strand inconspicuously developed. Leaves oblong-lingulate to oblong-lanceolate, slightly concave, strongly crisped when dry, erect spreading when moist, closely appressed on stems, not clearly sheathing at base; margins distinctly serrate or entire; costa rather broad, ending in the acumen or excurrent into subula; lamellae wavy or undulate, densely spaced on the ventral surface of costa, with several low lamellae or spines on the back; leaf cells unistratose; median cells rounded oval, quadrate, or irregularly subquadrate; basal cells rectangular or irregular, slightly thick-walled. Dioicous. Perigonia in rosettes, perigonial bracts sometimes with lamellae at its apex. Innovations often growing from the middle of perigonia. Setae yellowish or reddish brown, straight; capsules cylindrical or oblong-ovoid, erect or patent, usually single; exothecial cells smooth, stomata few, with inner and outer air chamber; columella with 4 longitudinal wings; peristome teeth 32, unequal in length; opercula conic, long or short beaked. Calyptrae cucullate, covered with sparse or dense cilia. Spores spherical, verrucose.
 
 
 

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1. Leaves with dense low lamellae on the back.................................................................................2
1. Leaves with several lamellae or without lamelllae...........................................................................3
2. Leaf margins serrate; upper ventral lamellae slightly wavy.................................................... 1. O. aligerum
2. Leaf margins entire; upper ventral lamellae strongly wavy............................................. 2. O. crossidioides
3. Leaves deeply cucullate when moist.........................................................................3. O. falcatum
3. Leaves mostly plane, not cucullate when moist............................................................................4
4. Leaves oblong, obtuse at apex; ventral lamellae slightly wavy............................................ 4. O. obtusatum
4. Leaves narrowly ovate-lanceolate, acute at apex; ventral lamellae strongly wavy...............................5
5. Upper stem leaves rather long, ca. 3.0 mm long, strongly crisped when dry............5. O. semilamellatum
5. Upper stem leaves shorter, 1.0–1.5 mm long, erect or slightly crisped when dry............. 6. O. suzukii
 
 
 
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