Grimmia ramondii
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Grimmia ramondii |
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| Grimmia ramondii | ||||||||||||
| ( Lam. & DC. ) Margad. |
Grimmia ramondii is a moss - kind from the family Grimmiaceae . German names are wing rib cushion moss , protruding slit tooth moss .
features
Grimmia ramondii forms loose, easily disintegrating, dark green or brownish green to yellow green cushions. The individual plants are up to 10 centimeters long, forked, mostly prostrate and arching in the front part. The moist upright or bent back leaves are elongated lanceolate and gradually narrowed to the tip. A glass tip is usually missing. The leaf margins are rolled back and mostly two-celled, the strong rib reaching to the tip of the leaf has two very clearly formed longitudinal lamellae in the upper half of the leaf on the back. At the base of the leaf, next to the rib, there are cells that are linear to elongated rectangular, bulky and thick-walled, in the leaf wings short rectangular to square and moderately thick-walled cells. Below the middle of the leaf, the cells are somewhat elongated and slightly bulged, above them irregularly round, square and always thick-walled.
The spore capsule on the seta , which is up to 5 millimeters long and curved when the spores are mature, is oval, inclined to horizontal, up to 1.8 millimeters long, smooth or wrinkled with age. The yellow-red capsule lid is usually beaked crooked, the hood ( kalyptra ) shaped like a hat, the long peristome teeth are purple-red. Spores are finely dotted and 12 to 16 micrometers in size. The species is diocesan .
Location claims and distribution
The species grows on moist to wet silicate rock. She likes to colonize steeply sloping surfaces at springs and streams. In Central Europe, the occurrences are limited to middle and high mountain areas, in Northern Europe they also occur in low altitudes. In the Central Alps it is dispersed to frequent, otherwise rare to very rare. Outside of Europe there are occurrences in parts of Asia and North America.
Systematics
In the past the species was the only one in the genus Dryptodon Brid. led because it occupies a middle position between the genera Grimmia and Racomitrium in the broader sense . Recently (Geissler & Maier 1995, Greven 1995) it has been assigned to the genus Grimmia .
Synonyms include Dryptodon patens (Hedw.) Brid., Grimmia patens (Hedw.) Bruch & Schimp., Racomitrium patens (Hedw.) Hübener.
Sources and further information
- 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 .
