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Leskeaceae Schimp. Search in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Publicado en: Corollarium Bryologiae Europaeae 109. 1856. (Coroll. Bryol. Eur.) Name publication detail
 

Datos del Proyecto Nombre (Last Modified On 2/20/2009)
Aceptación : Accepted
Datos del Proyecto     (Last Modified On 3/27/2009)
General Reference:

Notas     (Last Modified On 3/27/2009)
general taxon notes:

 

Species of the Leskeaceae are widely distributed in temperate zones. They are usually epiphytic on tree trunks or growing on surfaces of rocks. There are different viewpoints about the family’s delimitation and its systematic positions. We basically adopted the system of Brotherus (1924) and P.-C. Chen et al. (1978). The genus Okamuraea is transferred from the Rhytidiaceae to this family. The Leskeaceae have a close affinity with the Thuidiaceae, but the species of the present family can be distinguished from the Thuidiaceae by the following features: 1) paraphyllia absent or few, unbranched, smooth; 2) leaf cells smooth or unipapillose; 3) capsules mostly erect, symmetric; 4) endostomes varying greatly among genera and cilia usually rudimentary, rarely well developed. Nine genera are recognized for the Leskeaceae in this treatment.

 

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LESKEACEAE
薄罗藓科 bo-luo xian ke
by Cao Tong, Sun Jun, and Gao Chien
 
Plants mostly slender, dull or slightly shiny, in dense patches. Stems creeping, often irregularly branched; branches slender, erect or ascending; paraphyllia few, unbranched, or absent; central strand poorly developed. Stem leaves and branch leaves nearly uniform, ovate or ovate-lanceolate; costa strong, mostly single, reaching the middle or the apex of leaves, rarely rather short or lacking; leaf cells mostly parenchymatous, rarely elongate, smooth or unipapillose. Monoicous or dioicous. Perichaetia on stems, perigonia usually on lateral branches. Setae elongate, erect, smooth or coarsely papillose; capsules mostly erect, sometimes pendent, asymmetric; stomata phaneropore; peristome double; exostome teeth lanceolate or shortly lanceolate, lamellate or sometimes keeled; endostome segments varying greatly; basal membrane present, high; cilia usually rudimentary; opercula obtusely conic, with a short rostrum. Calyptrae cucullate, usually smooth, rarely with hairs. Spores small, spherical.

 

 

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1. Plants rigid; endostome evidently longer than the exostome...........................................9. Regmatodon
1. Plants mostly slender, delicate; endostome as long as the exostome or slightly shorter.........................2
2. Leaf costa single, ending below the midleaf or forked, rarely absent; leaf margins entire; leaf cells rounded, rounded ovate or shortly rhomboidal, smooth or mamillose............................ 7. Pseudoleskeella
2. Leaf costa single, reaching above midleaf; leaf margins serrulate; leaf cells rhomboidal, hexagonal or elongate- rhomboidal to nearly linear, mostly papillose or projecting at the upper ends, rarely smooth... 3
3. Endostome segments rudimentary or absent............................................................................4
3. Endostome segments relatively well developed............................................................................... 5
4. Plants small; leaves not plicate; leaf cells mostly rounded hexagonal or rhomboidal............. 4. Lindbergia
4. Plants rather large; leaves often plicate; leaf cells long rhomboidal........................................ 5. Okamuraea
5. Capsules inclined, not symmetrical; apophysis conspicuous; cilia well developed......... 8. Pseudoleskeopsis
5. Capsules erect, symmetrical; apophysis inconspicuous; cilia not rudimentary or absent......................6
6. Endostome segments irregularly shaped, not well developed...................................................7
6. Endostome segments regularly shaped, well developed....................................................................8
7. Plants rigid; leaves ovate-lanceolate, conspicuously plicate; leaf cells rounded hexagonal.......... 3. Leskeella
7. Plants delicate; leaves triangular-lanceolate, inconspicuously plicate; leaf cells long rhomboidal to nearly linear................................................................................................... 6. Orthoamblystegium
8. Dioicous; leaves acuminate at apex; leaf cells long rhomboidal or nearly linear, mostly projecting at the upper ends................................................................................................1. Lescuraea
8. Autoicous; leaves abruptly tapering to acute or acuminate at apex; leaf cells rounded to rounded hexagonal, smooth or papillose............................................................................................................ 2. Leskea
 
 
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