Mnium thomsonii
| Mnium thomsonii | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
_8704.JPG)
Mnium thomsonii |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Mnium thomsonii | ||||||||||||
| Chimp. |
Mnium thomsonii (German names are Geradschnäbeliges Sternmoos or Thomson Sternmoos ) is a moss - kind from the family Mniaceae .
features
The plants grow in dark green, later reddish brown lawns and reach heights of about 5 centimeters. The habit is slightly bent over. The stems are red to red-brown.
The leaves are slightly curled when dry, sticking upright when moist. They are largest at the tip of the shoot, including a little smaller, lanceolate and pointed, up to 5 (maximum 10) millimeters long and 1.3 millimeters wide. The fringed leaf margins are covered with pointed single or double teeth down to the middle of the leaf. The leaf rib, which emerges briefly or ends in the leaf tip, is serrated on the underside.
The cells in the middle of the leaf are mostly rounded and square and up to about 20 micrometers in size.
Sporogons are arranged individually. The inclined to horizontal capsule is elongated and yellow-brown to brown, the lid beaked. The warty-papillary spores are approximately 24 to 36 micrometers in size.
The gender distribution is diocesan .
Location requirements
The moss grows in moderately dry to moist, shady places on earth-covered limestone or calcareous rocks and on stony forest soils, and also in gaps in alpine lawns.
distribution
In Germany, Austria and Switzerland, the main distribution area is the Alpine region, here the species lives at altitudes from around 400 to over 3000 meters above sea level, but mainly in montane to alpine locations and is also common in the limestone areas. Outside the Alps, it occurs in the Swabian Alb and in the southern Black Forest, is rare in the rest of the mountain and hill country and is completely absent in the lowlands.
Mnium thomsonii is a subarctic-subalpine species with range in Eurasia and North America. In northern Europe it is distributed from the arctic to the boreal zone, in western, central and eastern Europe it occurs only at higher altitudes.
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 .
