Barbula (moss)
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The genus Barbula , German on sometimes beard Moose called, is a moss genus of from the family pottiaceae contains that many relatively inconspicuous soil and rock mosses. It is probably a polyphyletic collective genus.
description
They are mostly quite low (0.5 cm to 3 cm high), upright growing mosses with distinct trunks, which often form large cushions or lawns on the substrate.
The leaves are mostly lanceolate, in some species also tongue-shaped. When dry, the leaves are straight or slightly bent, but not curled. The midrib extends to the tip of the leaf or emerges briefly, but not as hyaline glass hair. The lamina cells are rectangular in the lower part of the leaves, rounded to square and cloudy green in the upper part.
The capsule, which stands on a long, yellowish or reddish seta , is cylindrical and upright. Your peristome consists of long, mostly twisted teeth. The kalyptra is cap-shaped. Many species also reproduce vegetatively through rhizoid gems .
Distribution and location requirements
The genus is cosmopolitan .
Most species grow on soil or rock, with many species preferring calcareous rock or calcareous soils.
Systematics and types
As is not uncommon in the Pottiaceae family , the delimitation of the genus is controversial. Barbula in the broader sense includes more than 300 species worldwide. In contrast, a part is currently mostly separated into separate genera ( Didymodon , Pseudocrossidium ) based on features of the peristome and the leaf veins as well as based on molecular data . In accordance with the Stech & Frey system, this division is also carried out here.
The genus Barbula (in the narrower sense) consists of around 200 species worldwide. The following species are represented in Germany, Austria and Switzerland:
- Barbula amplexifolia
- Barbula bicolor
- Barbula convoluta
- Barbula crocea
- Barbula enderesii
- Barbula unguiculata
Sources and further information
literature
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). Ulmer, Stuttgart 1983, ISBN 3-8001-2463-7 .
- Wolfgang Frey, Jan-Peter Frahm, Eberhard Fischer, Wolfram Lobin : The moss and fern plants of Europe (= small cryptogam flora. Vol. 4). Gustav Fischer, Stuttgart et al. 1995, ISBN 3-437-30756-8 .
