Nodding Pohlmoos
| Nodding Pohlmoos | ||||||||||||
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Nodding Pohlmoos ( Pohlia nutans ) |
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| Pohlia nutans | ||||||||||||
| ( Hedw. ) Lindb. |
The nodding Pohlmoos ( Pohlia nutans ) is a Parözisches , widespread but not frequent moss that grows in loose to dense, green to yellowish-green, slightly shiny, up to two cm high lawns. It is fruitful in spring and summer and can be found regularly with capsules.
Identifying features
The nodding Pohlmoos forms root-felted stems that are red-brown at the bottom. The leaves, up to 4 mm in size, stand upright on the stem, are gradually to sharply pointed, lanceolate and bent when dry. The crested leaves standing at the tip are not infrequently clinging to roof tiles and slightly sawed at the tip. The leaf margin is usually faintly turned over to over halfway. The lamina cells, which are much longer than Bryum, are about 6 × as long as they are wide, elongated rhombic about 100 µm long and 8 to 16 µm wide. At the tip of the leaf, the cells are linearly shaped, at the bottom they are wider and have thickened cell walls. The leaf veins are strongly developed, reddish-brown in color and ends before the tip. The red-brown seta, up to 5 cm long, is slightly twisted when dry. The yellowish to reddish brown capsule is nodding to pendulous and oval to ovate in shape. The cone-like capsule lid has a small tip. The outer peristome is finely papillary, light yellow in color and lined. The inner peristome is hyaline. The papillary spores reach a diameter of about 15 to 28 µm.
Occurrence
The nodding Pohlmoos inhabits lime-poor, somewhat alkaline, partially shaded to shady, dry to moist, moderately nutrient-rich locations on loamy, sandy or humus soil. It is not uncommon to find it on peat, rotten wood, overground rock or on tiled roofs. It is a typical character moss of the lime-poor forests and often occurs on forest path embankments and in raised bogs. Typical accompanying mosses are Hypnum cupressiforme , Plagiothecium spp., Dicranum scoparium , Dicranella heteromalla and Polytrichum formosum . The moss has a predominantly circumpolar distribution in the temperate to subarctic regions.
literature
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 , p. 106.
- 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 .
- Volkmar Wirth , Ruprecht Düll : Color Atlas of Lichen and Moss. Ulmer, Stuttgart (Hohenheim) 2000, ISBN 3-8001-3517-5 .
