Scorpidium cossonii
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Scorpidium cossonii |
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| ( Schimp. ) Hedenäs |
Scorpidium cossonii (German Yellow Green Scorpion Moss or Medium Scorpio Moss ) is a moss - kind from the family Scorpidiaceae . The name refers to Ernest Saint-Charles Cosson (1819-1889), a French botanist. More frequent synonyms are Drepanocladus cossonii (Schimp.) Loeske, Drepanocladus intermedius (Lindb.) Warnst.
features
Scorpidium cossonii forms loose to dense, green, yellow-green or brown lawns with its medium-sized plants. The stems are mostly distantly feathered. The leaves are narrowed from an egg-shaped base into the tip, curved sickle-shaped and have finely serrated, otherwise smooth edges near the tip of the leaf. The simple, relatively thin rib ends in the upper half of the leaf.
The lamina cells in the middle of the leaf are 14 to 95 (maximum 120) micrometers long, spotted, linear, the cell ends obliquely or only briefly pointed. The few (2 to 10) wing cells are hyaline, highly inflated and very decrepit.
The gender distribution is diocesan , capsules are very rare. The seta is up to 4 centimeters long, the oblong-cylindrical capsule somewhat curved and more or less horizontal, the capsule lid arched, conical and pointed. The spore size is 14 to 21 micrometers.
Similar species
Scorpidium cossonii and the rather similar Scorpidium revolvens were often viewed as just one species. Scorpidium revolvens differs through its often reddish tinted plants, longer lamina cells with long and pointed cell ends and autocratic gender distribution.
Other possibilities for confusion are: with Cratoneuron commutatum (with paraphyllia, strong rib and mostly serrated leaf margin), with Hamatocaulis vernicosus (central cord missing, no leaf wing cells), with Drepanocladus sendtneri (strong rib, thick-walled leaf wing cells), with warning storfia almost exannulata reach to the rib, serrated leaf margin).
Location requirements
The species grows in lime-rich or at least alkaline-rich locations in wet places in low and intermediate bogs, in springy places, in gullies and the like.
distribution
Distribution areas are Europe, North, East and Central Asia, North and South America.
Danger
In Germany, the species used to be widespread in suitable locations across the entire area from the lowlands to the Alps. Today it is found in larger stocks almost only in the moors on the edge of the Alps, in most other areas it has declined sharply due to the destruction of the growth areas and has become extinct in many areas.
Sources and literature
- Nebel, Philippi: The Mosses of Baden-Württemberg Volume 2 . 1st edition, Ulmer Verlag, 2005, ISBN 3-8001-3530-2 , page 318ff
