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

Published In: Corollarium Bryologiae Europaeae 101. 1856. (Coroll. Bryol. Eur.) Name publication detail
 

Project Name Data (Last Modified On 2/20/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/23/2009)
General Reference:

Notes     (Last Modified On 3/23/2009)
general taxon notes:

The family has 27 genera worldwide, of which 9 genera, consisting of 23 species, 2 subspecies and 7 varieties, are treated in China.


 

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Hookeriaceae
油藓科 you xian ke
by Lin Bang-juan and Benito C. Tan
 
Plants small to medium-sized, often soft and flaccid. Stems rarely branched, often flattened, loosely to densely foliate, 4–8 ranked. Leaves variable in outline, often bordered; costa single, double or absent, usually ending below the apex; leaf cells smooth or papillose, often rounded or hexagonal, lax; alar cells not differentiated. Setae elongate, smooth or scabrous; capsules oblong-ovoid to cylindrical, inclined or horizontal; peristome double; exostome teeth often with a wide median furrow line, papillose or striolate; opercula conic to rostrate. Calyptrae mitriform, lobed or ciliate at base, smooth, scabrous or pilose.
 

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1. Costa single..................................................................................................................2
1. Costae double, short or absent........................................................................................3
2. Leaves complanate, heteromorphic; upper laminal cells rounded hexagonal or polygonal; exostome teeth
striate-lamellate....................................................................................7. Distichophyllum
2. Leaves not complanate, isomorphic; upper laminal cells rhomboidal to oblong; exostome teeth papillose.......................................................................................................6. Daltonia
3. Costae elongate, strong, with at least one branch reaching half the leaf length..........................4
3. Costae short (never more than half the leaf) or absent.............................................................7
4. Leaf borders strongly differentiated; upper laminal cells rounded hexagonal, more than 30 µm in diameter
...............................................................................................5. Cyclodictyon
4. Leaf borders not or weakly differentiated; upper laminal cells oblong, rhomboidal to elongate, if rounded
hexagonal, less than 30 µm in diameter......................................................... 5
5. Stems erect; leaf borders weakly differentiated; margins entire; exostome teeth papillose.....1. Actinodontium
5. Stems creeping; leaf borders not differentiated; margins denticulate or serrate; exostome teeth cross-striate......................................................................................................................6
6. Plants green to yellowish green; costae reaching near the apex, strongly ridged, toothed or lamellate abaxially; laminal cells hexagonal to short rhomboidal......................................................... 2. Callicostella
6. Plants often purplish green; costae reaching about the leaf middle, not protruding abaxially; laminal cells oblong to rhomboidal..................................................................................................... 9. Hookeriopsis
7. Leaves with distinct borders..................................................................3. Calyptrochaeta
7. Leaves without borders......................................................................................8
8. Margins entire; leaf cells broadly oval, large, lax, more than 18 µm wide................................ 8. Hookeria
8. Margins serrate; leaf cells irregularly rhomboidal to shortly linear, projecting or papillose, less than 18 µm wide................................................................................................................................9
9. Costae double, short, with two unequal forks (longer one never more than half the leaf); leaf cells only projecting at upper ends; operculum short-rostrate...................................4. Chaetomitriopsis
9. Costae very short, mostly less than 1/4 the leaf length; leaf cells dorsally papillose; operculum long-rostrate......................................................Chaetomitrium (reported from Taiwan, not treated here)

Dendrocyathophorum is treated under the Hypopterygiaceae. 

 
 
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