Lejeunea cavifolia
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Lejeunea cavifolia |
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| ( Hon. ) Lindb. |
Lejeunea cavifolia (Hollow-leaved Lappenmoss) is a liverwort species from the Lejeuneaceae family .
features
The moss forms yellowish-green to light green, prostrate and dense lawns or grows over other deciduous mosses. The plants are small, irregularly branched, 1 to 2 cm long and 0.6 mm wide. The overshot flank leaves are bilobed: the larger upper lobe is broadly elliptical, slightly convex and with entire margins, the egg-shaped, bulbous, inflated lower lobe is only about a fifth as large as the upper lobe. Lower leaves are broadly ovate to almost circular in outline, three times as wide as the stem and up to half their length divided into two triangular, pointed lobes. The leaf cells are 24 to 40 µm in size and have thin walls. Each cell contains 25 to 70 small, 1 to 4 µm in size, egg-shaped to spherical oil bodies .
The moss is monoecious . Male gametangia are at the end of short branches, with 2 to 4 pairs of small, sac-shaped bracts. The female gametangia sit at the end of the trunk or at the end of branches, their bracts are unequal bilobed. Perianthia are common, they are pear-shaped, have five entire folds in the upper third and a short tube at the mouth. The spherical capsule has a short stalk. The green spores are initially unicellular, spherical and 30 µm in size, later larger and multicellular due to divisions. Disc-shaped, multicellular brood bodies are also formed on the leaf surfaces .
Location requirements
Lejeunea cavifolia grows in fresh, moist to wet and mostly shady, humid locations on predominantly lime-poor to lime-free, but base-rich substrate, often on steep silicate rocks, less often limestone rocks, often on the bark of deciduous trees, especially sycamore or ash , often over other mosses such as Ctenidium molluscum , Homalia trichomanoides , Neckera crispa or Thamnobryum alopecurum .
distribution
In Central Europe the moss is widespread, especially in the mountains, but rarely on the plains. It occurs worldwide in the northern hemisphere: Europe, Asia, North America and North Africa.
literature
- Nebel, Philippi: Die Moose Baden-Württemberg Volume 3 . Ulmer Verlag, 1st edition, 2005, ISBN 3-8001-3278-8
- Jan-Peter Frahm , Wolfgang Frey , J. Döring: Moosflora . 4th edition, UTB für Wissenschaft, Ulmer, Stuttgart 2004, p. 106. 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
