Diverse Riccardimoos
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Multi-column Riccardimoos ( Riccardia multifida ) |
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| ( L. ) Gray |
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The multi-columned Riccardimoos ( Riccardia multifida ) is a thalless liverwort . A synonym is Aneura multifida (L.) Dumort.
Identifying features
The thalli are pale green to dark green or brown (dry black), creeping to ascending, fairly regular and densely pinnate two to three times and up to 3 centimeters long. The individual thallus branches are linear-ribbon-shaped, 0.25 to 1 millimeter wide, biconvex in cross-section, with rounded or slightly edged tips. The middle of the thallus is about 3 to 8 cell layers thick, the edges are 2 to 4 rows wide, only single-layered and translucent. Epidermal cells are smaller than the subepidermal cells. Oil bodies are only present in part of the thallus cells, 1 or 2 per cell, they are egg-shaped and 15 to 25 µm long.
The plants are monoecious . The kalyptra is club-shaped and papilose, the spore capsule dark brown and elongated oval. Elaters sit at the tip of the four capsule valves. Spores are brownish, smooth and about 15 µm in size. Two-celled, egg-shaped brood bodies are rarely formed at the ends of the thallus.
Distribution and location requirements
The worldwide distribution includes Europe, Azores, Canary Islands, Madeira, parts of Asia, North and South Africa, America, Oceania. In Central Europe it is widespread, but not very common, from the plains to the subalpine altitude range, mainly in the low mountain ranges and the Alps.
The low-competitive, pioneering liverwort occurs in wet to moist, lime-poor, base-rich to weakly acidic, shady to light-rich locations and colonizes earth, swollen and boggy areas and wet to trickled rocks. The places of growth are forest paths, embankments, roadsides, ditches, river banks, gravel and clay pits, swamp forests, alder quarries and fens.
literature
- Jan-Peter Frahm, Wolfgang Frey, J. Döring: Moosflora . 4th edition, UTB Verlag, ISBN 3-8252-1250-5
- Ruprecht Düll, Barbara Düll-Wunder: Determine mosses easily and reliably . Quelle & Meyer Verlag Wiebelsheim, ISBN 978-3-494-01427-2
- Nebel, Philippi: Die Moose Baden-Württemberg Volume 3 . 1st edition, Ulmer Verlag, 2005, ISBN 3-8001-3278-8
