Rhytidium rugosum
| Rhytidium rugosum | ||||||||||||
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Rhytidium rugosum |
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| Systematics | ||||||||||||
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| Scientific name of the family | ||||||||||||
| Rhytidiaceae | ||||||||||||
| Bread. | ||||||||||||
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| Rhytidium | ||||||||||||
| (Sull.) Childb. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Rhytidium rugosum | ||||||||||||
| ( Hedw. ) Kindb. |
Rhytidium rugosum is aspecies of deciduous moss . It is the only species of the genus Rhytidium and the family Rhytidiaceae . German-language names are Runzelmoos, Hasenpfotenmoos or Hasenpfötchen. The genus name Rhytidium is derived from the Greek rhytides (wrinkle, folds) and refers to the wavy, wrinkled leaves.
features
Rhytidium rugosum forms very strong, loose, not shiny and yellow-green to gold-colored, in shady locations also green lawns. The robust, prostrate or ascending plants are up to 10 centimeters long and are irregularly branched to regularly pinnate. Characteristic are the up to 1.5 centimeters long, thickly swollen and usually one-sided leafed and curved down at the ends, reminiscent of the appearance of hare's paws.
The leaves are densely packed and arranged like roof tiles, one-sided and curved downwards in a sickle shape. They are drawn out into a long sawn point for an egg-shaped base, cross-wavy and wrinkled and rolled up narrowly at the edges in the lower area. The simple and thin leaf vein extends to the middle of the leaf or a little above it. Branch leaves are smaller than the stem leaves. Pseudoparaphyllia are present near the branches, they are undivided.
Leaf cells are oblong-rectangular, strongly thickened and pitted at the leaf base, elliptical to linear worm-shaped in the leaf center, 4 to 8 µm wide, 4 to 10 times as long and moderately thick-walled. The upper end of the cell often emerges as a thick papilla. The leaf wings contain a triangular group of numerous square to diamond-shaped, strongly thickened and stippled cells, which are drawn up at the edges.
The species is diocesan , but it is extremely rarely fruitful. The reddish-brown seta is up to 5 centimeters long, the capsule is high-backed and cylindrical, inclined to almost horizontal and smooth, with a double peristome and a crooked lid.
Location requirements
The moss grows in lime-rich and alkaline, sunny, dry and warm locations such as semi-arid and dry grasslands, light thermophilic forests and their borders; also in anthropogenic locations such as railway embankments, walls, embankments and stony places. South-exposed locations are preferred. Frequent companion mosses are Abietinella abietina , Homalothecium lutescens or Entodon concinnus .
distribution
Occurrences of this kind are found in Europe with Iceland, Asia, Africa, Greenland, North and Central America. In Germany it is absent in the northern German lowlands, in central and southern Germany it is widespread. In the Alps it rises by 3000 meters to high altitudes.
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 2: Special part, (Bryophytina II, Schistostegales to Hypnobryales). Ulmer, Stuttgart 2001, ISBN 3-8001-3530-2 .
