Moss thick leaf

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Moss thick leaf
Thick-leaf moss (Crassula tillaea)

Thick -leaf moss ( Crassula tillaea )

Systematics
Class : Bedecktsamer (Magnoliopsida)
Order : Saxifragales (Saxifragales)
Family : Thick-leaf family (Crassulaceae)
Subfamily : Crassuloideae
Genre : Thick leaf ( Crassula )
Type : Moss thick leaf
Scientific name
Crassula tillaea
Read Garl.

The thick-leaf moss ( Crassula tillaea ) is a species of plant from the genus thick-leaf ( Crassula ) within the thick-leaf family (Crassulaceae).

description

Thick moss leaf, prostrate
Thick-leaf moss, growing upright

The thick-leaf moss is an annual plant with a moss-like habit . The prostrate to upright stems are 1 to 5 cm (maximum 8 cm) long and branched. The opposite, ovate, pointed, succulent leaves are up to 2 mm long. The plants are often reddish.

In the leaf axils there are two to four threefold, seated, tiny flowers . The white to light pink petals are shorter than the approx. 1 mm long, fleshy sepals . There are three stamens . The flowering period extends from May to September in Germany and from April to July in Switzerland. The fruits contain precipitating seeds that are 0.2 by 0.4 mm in size.

The number of chromosomes is 2n = 28.

ecology

The thick moss leaf is a deciduous therophyte .

Occurrence

The species originally has a sub-Mediterranean-subatlantic distribution area. It is native to western, southern and southeastern Europe, the Mediterranean region, North Africa, Turkey , Saudi Arabia as well as the Canary Islands and Madeira . In Ireland , in Pacific North America ( British Columbia , Washington , Oregon , California ) and in South America (central Chile , Uruguay ) it is a neophyte .

The Moos-Dickblatt was found for the first time in 1822 in what is now Germany. In 2011 the moss thick leaf was detected for the first time in Lower Saxony , on Baltrum . In Schleswig-Holstein it is being naturalized; it was found there for the first time in turf on campsites . The first evidence for the Baltic Sea coast was on Fehmarn in 2012 . The species is considered a heat pointer; the spreading process observed in northern Germany began around the 1980s in Great Britain and the Netherlands and has now reached Denmark and is associated with climate change .

In Central Europe, thick-leaf moss occurs in therophyte corridors of moist (winter-wet) sandy soils, wet heaths, pond floors and turf. In the Netherlands and Great Britain, it prefers to grow on sandy soils, often on paths or parking lots .

The pointer values ​​according to Ellenberg are: light index L: 8 (light plant), temperature index T: 7 (heat indicator), continental index K: 2 (oceanic), humidity index F: 7 (humidity indicator), reaction index R: x (indifferent behavior), nitrogen index N: 3 (more common on low-nitrogen locations), salt number S: 0 (not salt bearing).

The thick moss leaf comes among other things. in the plant sociological association Nano-Cyperion (also called dwarf rush societies, dwarf rush corridor or annual mud corridor).

The IUCN lists the thick moss leaf as not endangered ( least concern ) and increasing in existence.

Systematics

The species was in 1753 by Linnaeus in Species Plantarum under the basionym Tillaea muscosa L. first described. In 1903 Lester Vallis published Lester-Garland in Fl. Jersey: 87 the species name valid today, Crassula tillaea . Further synonyms are Crassula muscosa (L.) Roth , Mesanchum connatum Dulac and Sedum tillaei E.HLKrause .

The original epithet muscosa and the common names Moosblümchen , mosbloempje (Dutch), mousse-fleurie (French) and mossy stonecrop (English) refer to the moss-like appearance of the plants.

Individual evidence

  1. ↑ a b c d Crassula tillaea Lest.-Garl. In: Info Flora. Retrieved August 31, 2021 .
  2. ↑ a b c d Metzing et al. 2011, p. 71
  3. ↑ Eckehart J. Jäger (Ed.): Rothmaler - Exkursionsflora von Deutschland . Vascular plants: baseline. 21st edition. Springer Spectrum, Berlin and Heidelberg 2017, ISBN 978-3-662-49707-4 , p. 339 .
  4. ↑ Metzing et al. 2011, p. 72
  5. ↑ a b c Crassula tillaea Lest.-Garl .: Moos-Dickblatt. In: Flora of Bavaria: Botanical information node Bavaria. Botanical State Collection Munich, accessed on September 5, 2021 .
  6. ↑ a b Crassula tillaea Lest.-Garl. In: Plants of the World Online. Royal Botanic Gardens Kew, accessed September 5, 2021 .
  7. ↑ Metzing et al. 2011
  8. ↑ State Office for Agriculture, Environment and Rural Areas of the State of Schleswig-Holstein (ed.): The fern and flowering plants of Schleswig-Holstein: Red List Volume 1 . Kiel 2021, ISBN 978-3-937937-99-1 , p. 15, 106 ( landsh.de [PDF]).
  9. ↑ Slim and Metzing 2019, p. 26
  10. ↑ Detlev Metzing: Spread of plants as a result of climate change . In: José L. Lozán, Siegmar-W. Breckle, Ruth Müller and Eike Rachor (eds.): Warning signal climate: The biodiversity . Verlag Wissenschaftliche Auswertungen, Hamburg 2016, p. 152-157 ( researchgate.net ).
  11. ↑ Metzing et al. 2011, p. 75
  12. ↑ Nanocyperion: Dwarf Rush Societies. In: The flora of Burgenland online. Naturschutzbund Burgenland, accessed on September 11, 2021 .
  13. ↑ Annual mudflat (dwarf rush corridor): Nanocyperion. In: Info Flora. Retrieved September 11, 2021 .
  14. ↑ Crassula Tillaea in the endangered Red List species the IUCN 2013. Retrieved on 31 August 2021st
  15. ↑ Tillaea muscosa L. In: Plants of the World Online. Royal Botanic Gardens Kew, accessed September 5, 2021 .

literature

  • Detlev Metzing, Heinrich Kuhbier and Bernd Küver: Crassula tillaea (Crassulaceae) on Baltrum - first record for Lower Saxony . In: Drosera . Year 2010, 2011, p. 71-76 ( researchgate.net ).
  • Pieter A. Slim and Detlev Metzing: Crassula tillaea (Crassulaceae) on Norderney - spread and habitats of a (still) rare species on the North Sea coast . In: Drosera . Volume 2014, 2019, p. 25-31 ( researchgate.net ).

Web links

Commons : Moos-Dickblatt ( Crassula tillaea )  - Collection of pictures, videos and audio files