Greasy sans nerve moss
| Greasy sans nerve moss | ||||||||||||
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Shiny sans-nerved moss ( Aneura pinguis ) |
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| Aneura pinguis | ||||||||||||
| ( L. ) Dumort. |
The glossy sans nerve moss ( Aneura pinguis , Syn .: Riccardia pinguis (L.) Gray) is a thaleless liverwort .
features
In keeping with its name, the fat-glossy sans-nerved moss grows with very fat-glossy, ribless thalli . These are fleshy and plump, rigid, easily fragile, ribbon-shaped, not or only slightly branched, 0.3 to 1 centimeter wide and up to 6 centimeters long, moist deep green, dry black green. The upper side of the thallus is more or less flat, the edges can be slightly curved, the lower side is convex, the tip usually rounded.
In cross-section, the thallus is 8 to 18 cell layers thick in the middle, with one to few layers at the edges, the epidermal cells being smaller than the cells in the interior of the thallus. The thallus cells each contain 6 to 30 small, spherical to egg-shaped oil bodies .
The species is dioecious , with the male plants being smaller than the female. Antheridia and archegonia are formed on very short and narrow side branches. The kalyptra is club-shaped, scaly or hairy, the seta 2 to 5 centimeters long, the spore capsule oval, the spores spherical to oval, brownish and 15 to 25 µm in size. Brood bodies are not formed.
Distribution and locations
The fat-shiny sans-nerved moss is spread over large parts of the world, in Central Europe it occurs from the plains to the mountain regions.
It grows in damp and wet, base-rich to slightly acidic, light to partially shaded locations: on wet soils, rocks, in limestone swamps and limestone tuffs, in spring bogs. As a pioneer species, it can colonize open areas quickly, but is not very competitive and is therefore easily displaced by other species.
Possibility of confusion
The moss can be confused with Pellia endiviifolia . Pellia endiviifolia often forms multiple forked shoots at the thallus tips , especially in autumn, whereas Aneura pinguis does not. Another microscopic distinguishing feature are the mucous papillae or hairs on the underside of the thallus tip: in Aneura pinguis they are single-celled club-shaped, Pellia endiviifolia always has multicellular mucous hairs.
literature
- Jan-Peter Frahm, Wolfgang Frey, J. Döring: Moosflora . 4th edition, UTB Verlag, ISBN 3-8252-1250-5
- Ruprecht Düll, Barbara Düll-Wunder: Determine mosses easily and reliably . Quelle & Meyer Verlag Wiebelsheim, ISBN 978-3-494-01427-2
- Martin Nebel, Georg Philippi (ed.): The mosses of Baden-Württemberg. Volume 3: Special Part (Bryophyta: Sphagnopsida, Marchantiophyta, Anthocerotophyta). Ulmer, Stuttgart 2005, ISBN 3-8001-3278-8 .
