Bryum pseudotriquetrum
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| ( Hedw. ) P.Gärtn. , E. Mey. & Scherb. |
Bryum pseudotriquetrum ( bulbous pear moss ) is a deciduous moss from the Bryaceae family . Bryum ventricosum Helhanis a synonym.
features
The strong, upright plants form lawns up to 10 centimeters high. These are olive green to brownish green or reddish. The stems are not very branched, have fairly even leaves and are covered with a thick felt of rhizoids far up. The ovate-lanceolate leaves stand upright when moist, dryly bent and close-fitting. Your leaf base runs down the stem for a long time. The leaf margins are rolled up and clearly lined with about 3 to 5 rows of narrow and elongated cells. In the area of the tip of the leaf, the edges are usually somewhat serrated. The strong, reddish leaf vein usually emerges as a short spike tip or ends in the leaf tip.
The reddish seta is up to 8 centimeters long and carries the nodding to pendulous, long pear-shaped capsule. The spores are 12 to 18 µm in size.
Varieties
Bryum pseudotriquetrum is a species rich in forms. A distinction is made between a dioecious variety pseudotriquetrum , which only less often develops sporophytes, and a synocial var. Bimum , which often produces fruit .
Location claims and distribution
Bryum pseudotriquetrum grows in light to partially shaded, moist to wet, base-rich to weakly acidic, often calcareous locations such as in bogs, swamps, on the banks of water, in ditches, on wet paths, on embankments or in gravel and clay pits.
The species occurs almost worldwide. It is widespread in Europe as well as in Central Europe from the plains to the high mountains. In the Alps in Bavaria it rises to around 2300 meters, in South Tyrol up to 2900 meters.
literature
- 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 .
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 .
- 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 .
