Hygrohypnum eugyrium
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Hygrohypnum eugyrium |
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| ( Chimp ) Loeske |
Hygrohypnum eugyrium (German names are Atlantic water sleep moss or Nordic water sleep moss ) is a deciduous moss species from the Amblystegiaceae family .
features
Hygrohypnum eugyrium with its moderately vigorous plants forms soft, light- or yellow-green to brownish lawns. The prostrate and irregularly branched trunks are up to 3 centimeters long. The trunk cross-section shows an arm-cell central cord and a three- to five-layer, small-cell and thick-walled trunk cortex, with the outer cell layer, however, consisting of thin-walled cells. The densely arranged, upright to slightly spreading leaves are straight to sickle-shaped, one-sided, hollow, ovate to ovate-lanceolate and drawn together into a short, sharp or blunt tip. The leaf edges are serrated only in the leaf tip, otherwise smooth. The leaf vein may be absent or it may be short and double.
The leaf wing cells are inflated, square to rectangular, thick-walled, hyaline or mostly red-brown and form a well-defined, hollowed group. The leaf cells in the middle of the leaf are worm-shaped, linear, blunt and moderately thick-walled, those of the leaf tip and base are shortened.
The seta is up to 2 centimeters long, the spore capsule is elongated, high-backed and uncovered, constricted under the mouth. The species is autocratic .
Location claims and distribution
Hygrohypnum eugyrium grows on waterfalls or in streams with clear and cool water on wet to trickled silicate rock. It occurs in parts of Europe (Western and Central Europe, mostly rare), in Eastern Asia and Japan, and in Eastern North America.
Systematics
The systematic classification of the species appears controversial; recently it is partly assigned as Pseudohygrohypnum eugyrium (chimp.) Kanda either to the Pylaisiaceae family or left with the Amblystegiaceae .
The author's information varies depending on the source; In addition to the Hygrohypnum eugyrium (Schimp.) Loeske used here, there is also the indication as Hygrohypnum eugyrium (Schimp.) Broth.
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 .
