Home Moss Flora of China
Name Search
About
Moss Checklist
Moss Flora
Guide to Authors
Participants
Glossary
Hydrogonium (Müll. Hal.) A. Jaeger 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: Bericht über die Thätigkeit der St. Gallischen Naturwissenschaftlichen Gesellschaft 1877–78: 405 (Ad. 2: 669.). 1880. (Ber. Thätigk. St. Gallischen Naturwiss. Ges.) Name publication detail
 

Project Name Data (Last Modified On 3/13/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/13/2009)
General Reference:

Notes     (Last Modified On 3/13/2009)
general taxon notes:
Most species of Hydrogonium occur in tropical and subtropical regions of the world, most commonly on calcareous rocks in moist habitats. Twelve species are found in China.

 

Export To PDF Export To Word

 

15. Hydrogonium (C. Müll.) Jaeg.    石灰藓属   shi-hui xian shu
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1877–1878: 405. (Ad. 2: 669). 1880.
 
Plants mostly medium-sized to large, sometimes small, usually grayish green, in dense tufts. Stems erect or inclined, simple or branched; central strand present. Leaves appressed, rarely contorted when dry, erect-spreading when moist, triangular- to ovate-lanceolate or ligulate, acute or blunt at the apex, plane or weakly keeled in the upper 1¤3 leaf length; margins mostly plane, occasionally revolute, entire, rarely serrulate near the apex; costa stout, percurrent to shortly excurrent, with 2 stereid bands in cross section, cells of adaxial surface of costa quadrate to short-rectangular, papillose or smooth, thin-walled; upper leaf cells loose, usually quadrate to hexagonal, thin-walled, mostly smooth, rarely mammillose or papillose, well defined in surface view; basal cells rectangular, smooth, hyaline. Gemmae usually present, in various shapes. Dioicous. Perichaetial leaves smaller than stem leaves, not sheathing at the base. Setae slender, straight, yellowish; capsules erect, cylindrical; annuli differentiated; peristome teeth linear, usually erect, rarely twisted counterclockwise; opercula long conic-rostrate. Calyptrae cucullate, smooth. Spores spherical, brownish, finely papillose.
 

Export To PDF Export To Word

 

1. Plants stiff; leaves triangular-lanceolate............................................................................................................... 2
1. Plants rather soft; leaves mostly ligulate.............................................................................................................. 7
2. Leaf apices acuminate..................................................................................................................................... 3
2. Leaf apices more or less blunt....................................................................................................................... 4
3. Leaf cells smooth............................................................................................................................ 2. H. arcuatum
3. Leaf cells mammillose or minutely papillose................................................................................... 1. H. anceps
4. Costa percurrent.............................................................................................................................................. 5
4. Costa excurrent...................................................................................................................... 10. H. sordidum
5. Leaf cells smooth......................................................................................................................... 12. H. williamsii
5. Leaf cells mammillose........................................................................................................................................... 6
6. Costa stout; leaf cells rather thick-walled; leaf apices entire; gemmae present............ 4. H. gangeticum
6. Costa slender; leaf cells thin-walled; leaf apices serrulate; gemmae absent................. 5. H. gracilentum
7. Costa shortly excurrent.......................................................................................................................................... 8
7. Costa percurrent or ending a few cells below the apex....................................................................................... 9
8. Lower leaf margins revolute; gemmae present, filiform or spindle-shaped.................. 8. H. majusculum
8. Lower leaf margins plane, not revolute; gemmae absent................................... 9. H. pseudoehrenbergii
9. Leaves broader, ovate-ligulate...................................................................................................... 7. H. javanicum
9. Leaves narrower, lanceo-ligulate......................................................................................................................... 10
10. Leaf cells distinctly papillose; upper leaf margins serrulate.................................. 11. H. subpellucidum
10. Leaf cells smooth or rarely mammillose; upper leaf margins entire..................................................... 11
11. Leaves plane; leaf apices rounded; costa ending below the apex.......................................... 3. H. ehrenbergii
11. Leaves plicate; leaf apices somewhat apiculate; costa percurrent............................................. 6. H. inflexum

 

 
 
© 2014 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110