Plagiochila porelloides
| Plagiochila porelloides | ||||||||||||
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Plagiochila porelloides |
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| Scientific name | ||||||||||||
| Plagiochila porelloides | ||||||||||||
| ( Nees ) Lindenb. |
Plagiochila porelloides is aspecies of liverwort from the Plagiochilaceae family . German-language names are Kleines Schiefmundmoos and Kleines Muschelmoos .
features
Plagiochila porelloides has only been systematically separated from the very similar and closely related species Plagiochila asplenioides since around 1980 and differs only slightly from it. However, Plagiochila porelloides is usually much smaller in all parts. In the case of intermediate forms that occur occasionally, assignment is difficult.
The moderately vigorous to vigorous plants are not branched or rarely branched, are 1.5 to 7 centimeters long and 2 to 5.6 millimeters wide, grow prostrate to ascending and form green to dark green lawns. The flank leaves that run down the top of the trunk are oval to obovate with a rounded tip, asymmetrical, transversely curved and often shell-shaped and hollow. They are usually 1.3 to 2.4 millimeters long and 0.9 to 2.4 millimeters wide, rarely longer and wider. The leaf margin is usually toothed small, rarely almost entire. Lower leaves are very small or absent entirely.
Leaf cells are rounded-hexagonal, in the leaf center 24 to 44 µm in size, with slightly thickened cell walls and slightly thickened cell corners. There are 4 to 10 oil bodies per cell.
Plagiochila porelloides is dioecious . Perianthia protrude far from the bracts, are flattened at the top and have a thorny toothed mouth. Spore capsules are oval, 70 to 80 µm thick, the smooth spores are 16 to 18 µm in size. Spore ripening is in spring, but the species rarely produces fruit.
ecology
Plagiochila porelloides grows on fresh to moist, mostly shaded, nutrient-rich, lime-rich to moderately base-rich, non-humic or poorly humic locations: mostly in forests on rock, at the base of trees and on embankments and cracks, but rarely directly on the ground.
distribution
The species is widespread in Europe, including in the far north. In southern Europe it is absent in low areas. Outside of Europe there are occurrences in Asia, North America and North Africa.
literature
- Jan-Peter Frahm , Wolfgang Frey , J. Döring: Moosflora . 4th edition, UTB Verlag, 2004, ISBN 3-8252-1250-5
- Nebel, Philippi: Die Moose Baden-Württemberg Volume 3 . 1st edition, Ulmer Verlag, 2005, ISBN 3-8001-3278-8
