''Placynthium'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of
lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.[fungi
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...]
in the family
Placynthiaceae
The Placynthiaceae are a lichenized family of fungi in the order Peltigerales. Species of this family are found largely in northern temperate regions.
Genera
Numbers of species accepted by Species Fungorum
''Index Fungorum'' is an internationa ...
.
Members of this genus are commonly called blackthread lichens.
[USDA Natural Resources Conservation Service Name Search]
/ref>Blackthread Lichen (Placynthium), Encyclopedia of Life
/ref>
Species
*'' Placynthium anemoideum''
*'' Placynthium asperellum''
*'' Placynthium australiense''
*'' Placynthium caesium''
*'' Placynthium filiforme''
*'' Placynthium flabellosum''
*'' Placynthium garovaglii''
*'' Placynthium glaciale''
References
Peltigerales
Lichen genera
Taxa named by Erik Acharius
Taxa described in 1810
Peltigerales genera
{{Peltigerales-stub