Usnea hirta
| Usnea hirta | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Usnea hirta |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Usnea hirta | ||||||||||||
| ( L. ) Weber ex F.H.Wigg. |
Usnea hirta , seldom referred to as pit lichen , is a shrub lichen that grows on tree bark.
description
The shrubby-bushy thallus of the pit lichen is only fused to the base in one place, it is greyish to yellowish green and reaches up to about 5 cm in length and width. The branches are up to 0.6 mm thick (rarely more), sometimes angular or somewhat pitted and have a tough, white central strand on the inside. It is characterized by a light base and numerous long and thin isidia protruding like a thorn . Fruit bodies ( apothecia ) are very rare.
Location and distribution
Pit lichen grows on tree bark, mainly on conifers or deciduous trees with acidic bark. It is the most drought-tolerant species of its genus and at the same time one of the most common Usnea species in Central Europe. Nevertheless, like almost all shrub lichen, it is particularly sensitive to air pollutants and has therefore almost disappeared from many areas of Germany or can only be found in stunted growth. As a result of flue gas desulphurisation , however, it can increasingly migrate back to industrialized conurbations.
Others
The bryological-lichenological working group for Central Europe named the pit lichen as lichen of the year 2005.
literature
- Volkmar Wirth: Lichen flora . E. Ulmer, Stuttgart 1980, p. 506, ISBN 3-8001-2452-1 .
- Volkmar Wirth, Ruprecht Düll : Color Atlas of Lichen and Moss. Ulmer, Stuttgart 2000, ISBN 3-8001-3517-5 , p. 27.
Web links
- Entry Index Fungorum
- Description at nabu.de
- Images, sharnoffphotos.com
- Picture and brief description, U. Kirschbaum (Engl.)
Common yellow lichen (2004) | Pit lichen (2005) | Caperate lichen (2006) | Icelandic moss (2007) | Wolf Lichen (2008) | Reindeer Lichen (2009) | Pink Lichen (2010) | Common fire lichen (2011) | Real lung lichen (2012) | Dwarf Shield Lichen (2013) | Map lichen (2014) | Yellow-fruited sulfur lichen (2015) | Heather (2016) | Hepps Schönfleck (2017) | Fringed umbilical lichen (2018) | Broad-lobed bowl lichen (2019) | Finger Scarlet Lichen (2020)