Price liverwort
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Preiss liverwort ( Preissia quadrata ) |
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| Scientific name | ||||||||||||
| Preissia quadrata | ||||||||||||
| ( Scop. ) Nees |
The price liverwort ( Preissia quadrata ), also known as square price moss , is a liverwort species and the only species of the genus Preissia worldwide . It is named after Balthasar Preiss, born in Bruchsal in 1765, died as a regimental doctor in Prague in 1850.
description
The Preiss liverwort is a thaleless liverwort. The recumbent thalli are 2 to 5 centimeters long and 0.4 to 1 centimeter wide, they are green on the top, usually reddish-edged and often cut heart-shaped at the ends. The top has no median and is divided into small, elongated hexagonal to rectangular fields. These fields are air chambers with a barrel-shaped breathing opening in the middle. The underside of the thallus is usually purple with tiled abdominal scales.
The plants are monoecious or dioecious . Female gametangia are hemispherical to rounded-square and are located on 5 to 10 cm long, upright stems, the disc-shaped male gametangia have shorter, 1 to 2 cm long stems. The moss is often fruiting, spore ripening is from May to August.
Location claims and distribution
The Preiss liverwort loves bases and grows in permanently moist to wet, light-rich to deeply shaded locations on rock, earth, loess slopes, in flat limestone bogs and on walls.
The species is distributed circumboreally. In Central Europe it occurs scattered from the plains to the high mountains, more frequently in southern Germany and the Limestone Alps.
Danger
Although competitive but not very pioneering, moss is considered endangered in Germany. In individual natural areas, stocks have declined sharply. Due to land consolidation or maintenance measures, occurrences outside of forests on older loess walls and walls have become rare today.
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
