Hygroamblystegium
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| Hygroamblystegium | ||||||||||||
| Loeske |
Hygroamblystegium is a genus of deciduous mosses in the Amblystegiaceae family .
description
The mosses grow on and in the water. The stems are simply or irregularly branched, the stem cross-section has a central strand. Paraphyllia are occasionally present. The upright to protruding leaves are eilanzettlich, blunt to pointed and whole to slightly serrate . The strong vein ends in the leaf tip or emerges. The lamina cells are rhombic-hexagonal to narrow rhombic, about 3 to 6 times as long as wide. Leaf-wing cells are not or only poorly differentiated. The spore capsule with a double peristome is inclined, the lid is conical.
Systematics and types
Hygroamblystegium species were traditionally assigned to the genus Amblystegium , the split is not undisputed. According to the Frey / Fischer / Stech system, 18 species worldwide belong to Hygroamblystegium , which occur in temperate zones, in the Arctic and Antarctic.
The following species are represented in Germany, Austria and Switzerland:
- Hygroamblystegium fluviatile (river water stump moss, river stump cover)
- Hygroamblystegium humile (Low water stump moss )
- Hygroamblystegium tenax (Rigid water stump moss)
- Hygroamblystegium varium (variable water stump moss )
literature
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 .
- Wolfgang Frey , Michael Stech, Eberhard Fischer: Bryophytes and Seedless Vascular Plants (= Syllabus of Plant Families. 3). 13th edition. Borntraeger, Berlin et al. 2009, ISBN 978-3-443-01063-8 .
