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Orthotrichaceae Arn. Search in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Disposition Méthodique des Espèces de Mousses 13. 1825. (Disp. Méth. Mousses) Name publication detail
 

Project Name Data (Last Modified On 2/20/2009)
Acceptance : Accepted
Project Data     (Last Modified On 12/16/2011)
General Reference:
Contributor: Jia, Yu, He, Si, Guo, Shui-Liang

Notes     (Last Modified On 12/16/2011)
general taxon notes: The Orthotrichaceae consist of 19 genera in the world (Goffinet et al. 2009); nine of them occur in China. Orthomitrium Lewinsky-Haapasaari & Crosby was once an endemic genus to China (Lewinsky-Haapasaari & Crosby 1996), consisting of two species: O. schofieldii B. C. Tan & Y. Jia and O. tuberculatum Lewinsky-Haapasaari & Crosby. It has recently been treated as a synonym of Orthotrichum Hedw. (Allen 2002). The strong argument provided by Allen (2002) to support the synonymy agrees with this study. The genus Amphidium Schimp. has often been included in the Orthotrichaceae (Crum & Anderson 1981; Noguchi & Iwatsuki 1989). One species of Amphidium occurs in China and it has been treated under the Dicranaceae in volume 1 of this flora.

 

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ORTHOTRICHACEAE
木灵藓科 mu ling xian ke
by Jia Yu, Si He, and Guo Shui-liang
 
 

Plants small to large, dark green, greenish brown or reddish brown, often in tufts, cushions, or mats on tree trunks, sometimes on rocks. Stems erect or prostrate, short or elongate, simple or branched, with dense rhizoids; central strand absent in cross section. Leaves crowded, appressed, contorted or flexuose, often curled, spirally twisted when dry, erect-spreading to recurved or squarrose when moist, usually lanceolate, oblong-lanceolate to ovate-lanceolate or elliptic, occasionally lingulate, usually keeled, acuminate, acute, or apiculate, rounded-obtuse at apex; margins mostly entire, plane or recurved; costae single, strong, ending near the apex to shortly excurrent; upper leaf cells often small, rounded-hexagonal, shortly rectangular, occasionally elongate, firm-walled to thick-walled, often papillose, sometimes bulging to mammillose, rarely smooth; lower cells elongate-rectangular to linear at the base, often incrassate, hyaline or yellow; alar cells not differentiated. Autoicous or dioicous. Inner perichaetial leaves not or slightly differentiated, rarely vaginate. Setae very short to elongate; capsules erect, immerse to exserted, often symmetrical, ovoid or cylindrical, rarely pyriform, usually deeply furrowed, sometimes puckered at the mouth; opercula conic-apiculate to rostrate; annuli usually present; peristome usually double, sometimes single, rarely absent; prostome sometimes present; exostome teeth 16, lanceolate, often united or in pairs, often densely papillose, or striolate at the base; endostome segments thin, 0, 8, or 16, linear or lanceolate, often reduced, smooth or ornamented; basal membrane low to absent; cilia absent. Calyptrae cucullate or mitrate, often plicate, naked or hairy. Spores spherical, unicellular or multicellular, often papillose.

 

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1. Stems slender, elongate, prostrate, subpinnately branched, often forming large, flattened mats..................... 2
1. Stems short, erect, more or less dichotomously branched, often forming tufted mats.................................... 6
2. Median and upper leaf cells elliptic, arranged in diagonal rows; calyptrae conspicuously large, not plicate, broadly lobed at the base............................................................................................................. 7. Schlotheimia
2. Median and upper leaf cells rounded-quadrate, irregularly arranged; calyptrae small to medium-sized, not particularly large, usually plicate, not lobed or laciniate at the base................................................................ 3
3. Leaves erect-appressed when dry, excavated at the base................................................................ 3. Macrocoma
3. Leaves flexuose or crisped when dry, not excavated at the base.......................................................................... 4
4. Branch leaves flexuose when dry, often channeled along costa; calyptrae cucullate, not plicate; spores multicellular................................................................................................................................. 1. Drummondia
4. Branch leaves crisped when dry, not channeled; calyptrae campanulate, usually plicate; spores unicellular.......................................................................................................................5
5. Basal leaf cells short, rounded-quadrate to shortly rectangular except at the borders differentiated by several rows of linear cells.............................................................................................................. 2. Groutiella
5. Basal leaf cells elongate, not bordered at the margins.............................................................. 4. Macromitrium
6. Basal leaf cells usually shortly rectangular to rectangular; calyptrae mitrate, often plicate......................... 7
6. Basal leaf cells usually quadrate or rounded-quadrate; calyptrae cucullate, not plicate................................ 8
7. Basal juxtacostal cells clearly differentiated, short and pale, strongly thick-walled, smooth; calyptrae lobed at the base, sometimes with a few hairs...................................................................................................... 8. Ulota
7. Basal juxtacostal cells not clearly differentiated, thin-walled to moderately thick-walled, usually papillose or mammillose, rarely smooth; calyptrae usually not lobed at the base, often hairy............... 5. Orthotrichum
8. Plants small, slender, in tufts; stems short, often simple, rarely branched; leaves appressed or flexuose, not crisped; leaf cells lax, thin-walled; perichaetial leaves vaginate; capsules shortly pyriform................. 6. Rhachithecium
8. Plants small to medium-sized, in cushions; stems dichotomously branched; leaves crisped; leaf cells small, thick-walled; perichaetial leaves slightly differentiated, not vaginate; capsules elongate-ovoid.................9. Zygodon
 
 
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