Pohlia cruda
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Pohlia cruda |
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| Pohlia cruda | ||||||||||||
| ( Hedw. ) Lindb. |
Pohlia cruda (German light green Pohlmoos ) is a deciduous moss - species from the family Mniaceae . A synonym is Webera cruda (Hedw.) Schimp.
features
Pohlia cruda forms loose to moderately dense, up to 4 centimeters high, light green to bluish green and dry, strikingly metallic, shiny lawns. The upright stems are reddish. The leaves are small, lanceolate and distant in the lower stem section, larger and longer, narrowly lanceolate and tufted at the stem tip. The leaf margins are completely serrated up to the tip, the lower red vein ends in front of the leaf tip. The leaves are difficult to wet.
The lamina cells are linear, slightly worm-shaped, 8 to 14 micrometers wide and up to 200 micrometers long. They are fairly uniform in almost the entire leaf area, only slightly narrower at the edge and rectangular and reddish at the leaf base.
The species can either be dioecious or parözisch (gametangia separated on the same stem) or synocial (hermaphroditic). The seta, which is 3 centimeters long, is reddish, tortuous and curved like a swan neck at the top, the spore capsule inclined, horizontal, rarely hanging, yellow-brown and elongated ovoid. The neck of the capsule is half the length of the urn. The capsule lid is curved flat or hemispherical and usually has a wart. The outer peristome is pale yellow and papillous, the inner almost hyaline. Spores are 18 to 25 micrometers in size and finely papillary.
Location claims and distribution
The moss colonizes lime-poor, but slightly alkaline, moderately fresh to moist, mostly partially shaded, open-ground areas, especially in sunken paths, on embankments or in earthy rock crevices. In the high mountains it can also be found in alpine lawns.
In Europe, it is particularly widespread in the mountains at higher altitudes. From the Central Alps, sites up to an altitude of 3500 meters are given. In the lowlands it is rare or completely absent. Worldwide it is circumpolar in the northern and southern hemispheres.
literature
- 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 .
