Tortella pseudofragilis
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Tortella pseudofragilis |
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| (Thér.) Köckinger & Hedenäs |
Tortella pseudofragilis is a moss -Art from the family pottiaceae .
features
Tortella pseudofragilis forms loose to dense, yellowish green to green, in the lower part brownish pads or lawns. The densely leafed and not very branched shoots reach heights of about 1 to 2 (4) centimeters. The leaves are 3 to 8 millimeters long, brittle and the upper part of the leaf is therefore often broken off. They are linear-lanceolate, long and finely pointed and somewhat wavy. When wet, they are upright and more or less rigid, when dry, the tips of the leaves are often more or less horizontal and individual shoots of the lawn are barely recognizable when viewed from above. Its lamina is consistently single-layered, the leaf margins entire with marginal cells that are not or only slightly protruding. The leaf vein emerges as a short to long spike tip.
The lamina cells of the leaf base are elongated, rectangular, hyaline, smooth and sharply demarcated from the rounded, green and strongly papillary cells in the upper part of the leaf. The marginal cells of the upper half of the leaf are oblong to square. The upper side of the leaf vein and its underside in the upper part of the leaf are covered with rounded, square, papillary cells. The stems usually have a central cord.
The moss is diocesan . The cylindrical spore capsule has thread-like peristome teeth that are turned only 1/2 times and a long and crooked beaked lid.
Location claims and distribution
Tortella pseudofragilis grows on base-rich, mostly calcareous rock, but avoids pure dolomite. In lower places it often grows in shady places, with increasing altitude preferably in sunny places.
The general distribution is not well known as this kind often with other Tortella was confused species. One of the main areas of distribution is apparently in the Alps, where moss is not uncommon in some areas. Here it rises up to the subalpine altitude. So far, there are few secured sites in Germany. Occurrences outside of Europe are not known.
Possibility of confusion
Tortella bambergeri can easily with other Tortella be confused species, especially with Tortella tortuosa to drier locations. Differentiating features from Tortella tortuosa are the always brittle, rigidly upright leaves and the lower (dorsal) side of the leaf vein in the upper part of the leaf, which is covered with rounded papillary cells. The underside of the leaf vein of Tortella tortuosa , on the other hand, has only long and smooth cells on the entire underside.
In Tortella fasciculata , the marginal cells in the upper half of the leaf are transversely wide to square and the dry leaves are usually curled or curled up to the tip of the leaf.
Synonym Tortella bambergeri
According to Köckinger & Hedenäs (2017), the name Tortella bambergeri should be discarded in the conventional view, since T. bambergeri consists of two species, namely Tortella fasciculata and the Tortella pseudofragilis described here . The type material of T. bambergeri belongs in a broader sense to Tortella tortuosa .
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 1: General part, special part (Bryophytina I, Andreaeales to Funariales). Ulmer, Stuttgart 2000, ISBN 3-8001-3527-2 .
- A farewell to Tortella bambergeri (Pottiaceae) as understood over the last decades
