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Rhizomnium (Mitt. ex Broth.) T.J. Kop. 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: Annales Botanici Fennici 5(2): 142. 1968. (Ann. Bot. Fenn.) Name publication detail
 

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 13 species in the world (Crosby et al. 2000). In China, 12 species were reported (Redfearn et al. 1996, Koponen and M.-J. Lai 1978), and 10 species are recognized in this treatment.

Doubtful species:

Rhizomnium andrewsianum (Steere) T. Kop. is a species from Europe, North America, and Russia. W.-H. Wang et al. (1994) first reported it in Shanxi Province. We were unable to verify any voucher specimens of this record. Rhizomnium appalachianum T. Kop. was reported by B.-G. Zhong & Y.-X. Xiong (1990) in Mt. Fanjing, Guizhou Province. No specimens of this species could be verified during our study.

 

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7. Rhizomnium (Mitt. ex Broth.) T. Kop.   毛灯藓属   mao deng xian shu
Ann. Bot. Fenn. 5: 142. 1968. Mnium sect. Rhizomnium Mitt. ex Broth., Nat. Pflanzenfam. I(3): 612. 1904.
 
Plants small to medium-sized or rather large, dark green, reddish brown or reddish, in loose or dense tufts. Stems erect, usually not branched, densely radiculose nearly throughout, especially at base. Leaves usually broadly ovate, obovate or nearly rounded, narrowed at base, obtuse at apex; margins entire, not bordered or bordered by one to several rows of elongate-rectangular cells; costae percurrent or ending below the apex; leaf cells mostly regularly pentagonal or hexagonal, rarely shortly rectangular or rounded, uniformly thick-walled or somewhat thickened at corners, often porose. Dioicous or synoicous (rhizoautoicous). Sporophytic features similar to those of Mnium.
 
 
 

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1. Leaves obovate-spathulate; costae excurrent; leaf cells irregularly rectangular, twice as long as width; capsules longitudinally striate when dry..........................................6. R. parvulum
1. Leaves elliptical, broadly obovate or orbicular; costae ending below the apex or percurrent; leaf cells isodiametric, hexagonal or rounded; capsules not striate when dry................................2
2. Leaves long-elliptical or long-obovate; costae percurrent or ending just below the apex................3
2. Leaves broadly obovate or rounded; costae ending well below the apex.....................................4
3. Leaves long-elliptical; leaf cells 30–50 μm × 40–80 µm, irregularly rounded-oblong, cell walls thickened at corners.................................................................................9. R. striatulum
3. Leaves long-obovate; leaf cells 55–90 μm × 95–135 µm, regularly hexagonal, cell walls usually uniformly thickened.............................................................................10. R. tuomikoskii
4. Leaves elliptical or obovate, plane, not crisped when dry; leaf apices apiculate....................5
4. Leaves broadly elliptical, broadly obovate or orbicular, crisped when dry; leaf apices rounded.................. 7
5. Leaves often crowded at apex, squarrose; walls of marginal cells irregularly thickened and distinctly porose
......................................................................................3. R. horikawae
5. Leaves scattered, spreading; walls of marginal cells not porose...................................6
6. Leaf margins bordered by 1–2 rows of rectangular cells; leaf base not decurrent... 7. R. pseudopunctatum
6. Leaf margins bordered by 2–4 rows of elongate cells; leaf base long-decurrent................. 8. R. punctatum
7. Leaves large, broadly elliptical, undulate; cell walls strongly porose......................4. R. magnifolium
7. Leaves small, nearly rounded, scarcely undulate; cell walls scarcely or weakly porose..................8
8. Leaves scattered at stem apex; margins bordered by 1–2 rows of more or less rectangular cells.......... 2. R. hattorii
8. Leaves often dense at stem apex; margins bordered by 3–4 rows of narrowly elongated cells.................... 9
9. Leaves dark green, marginal cells rectangular, not or scarcely porose...........................1. R. gracile
9. Leaves pale green, marginal cells irregularly elongate, weakly to distinctly porose.........5. R. nudum
 
 
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