Syntrichia virescens
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Syntrichia virescens |
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| ( De Not. ) Ochyra |
Syntrichia virescens (German Green composite tooth moss green rotary tooth or Green rotary tooth moss) is a moss -Art in the family pottiaceae . A common synonym is Tortula virescens (De Not.) De Not.
description
The plants, up to 2 centimeters in size, form dense, olive-green to dirty brown-green lawns that shimmer with a grayish shimmer through the glass hair. The stem cross-section has a central strand. At the tip of the stem, the leaves are clumpy and larger, they are dry, loosely fitting and slightly twisted, when moist, protruding upright and slightly to moderately curved back. They are spatulate, usually slightly narrowed in the middle, rounded or edged at the tip. The leaf margins are flat or slightly bent in the middle. The light-colored to brown leaf vein ends at the tip of the leaf in a long, more or less serrated, hyaline glass hair. The upper (ventral) side of the rib shows papillary cells, the cross-section of the rib shows 2 to 3 rows of spacious stereids.
The lamina cells are rectangular and hyaline on the base of the leaf next to the rib, shorter and narrower towards the edge. In the upper half of the leaf they are rounded to hexagonal, about 12 to 14 micrometers in size and densely covered with papillae that do not protrude beyond the cell walls and therefore make them clearly visible under the microscope.
The gender distribution is diocesan . Sporogons are rare. The red seta is up to 15 millimeters long, the cylindrical capsule is upright to slightly curved. The pointed lid is up to half the length of the capsule. Peristomal teeth are twisted, their basement membrane is 0.4 millimeters high. The spore size is 10 to 18 micrometers.
variety
There are forms with missing glass hair, these are described as Syntrichia virescens var. Mutica (Nebel & Heinrichs) or Tortula virescens var. Mutica Nebel & Heinrichs .
Location claims and distribution
The species often grows on tree bark in orchards or avenues in bright, sunny and humid places, and also on stone, concrete, asphalt, walls and roofs.
It occurs in Germany, Austria and Switzerland scattered from the flat and hill country to the lower Montan level (up to 1000 meters above sea level). It is absent in larger forest areas or in the Alps.
The distribution area is Europe, towards the north to southern Scandinavia and in the south with large distribution gaps in the Mediterranean area and the Middle East.
swell
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 , p. 312.
- 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 , p. 263.
