Comb split-tooth moss
| Comb split-tooth moss | ||||||||||||
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Comb split-tooth moss ( Fissidens dubius ) |
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| Fissidens dubius | ||||||||||||
| P.Beauv. |
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The comb-split-tooth moss ( Fissidens dubius , syn .: Fissidens cristatus Wilson ex Mitt.) Is a deciduous moss species from the family Fissidentaceae .
features
Fissidens dubius grows in dense green or yellow to brownish green lawns. The little branched shoots are about 2 to 5 centimeters high and with many pairs of leaves strictly two-line and densely leafed. The tongue-shaped to broadly lanceolate leaves are almost everywhere the same width and short narrowed to the sharp point. In the upper part they are sawed irregularly at the edges. The upper leaf blade part is usually shorter than the sheath part. The leaf vein extends into the leaf tip.
The lamina cells, which are usually single-layered, sometimes also double-layered, are somewhat opaque, round to rounded and angular and about 7 to 12 µm in size. At the leaf margins the cells in 3 to 4 rows are clearly lighter and thicker-walled.
The reddish, about 1 centimeter long seta arises in the middle or lower part of the rung and carries the slightly curved, inclined to horizontal spore capsule. The capsule lid is slightly crooked and long beaked. Spore ripening is from late autumn to spring.
Occurrence
The moss grows mainly on mostly chalky, shady to light-rich and moist to dry rock sites. Furthermore on mostly calcareous earth and loess, also on walls.
It occurs in Europe, Asia, North Africa, the Azores, Canary Islands and Madeira as well as in North and Central America. In Central Europe it is particularly common in the low mountain ranges and in the Alpine region, otherwise less often.
literature
- Ruprecht Düll , Barbara Düll-Wunder: Determine mosses easily and reliably. An illustrated excursion guide to the types of Germany and neighboring countries. Quelle & Meyer, Wiebelsheim 2008, ISBN 978-3-494-01427-2 .
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 .
- Martin Nebel, Georg Philippi (ed.): The mosses of Baden-Württemberg. Volume 1: General part, special part (Bryophytina I, Andreaeales to Funariales). Ulmer, Stuttgart 2000, ISBN 3-8001-3527-2 .
