''Orthotrichum casasianum'' is a species of
moss
Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hor ...
in the family
Orthotrichaceae
Orthotrichaceae is the only family of mosses in the order Orthotrichales. Many species in the family are epiphytic.
Classification
*'' Cardotiella''
*'' Ceuthotheca''
*'' Codonoblepharon''
*'' Desmotheca''
*'' Florschuetziella''
*'' Groutiella' ...
. It is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to the Spanish province of
Álava
Álava ( in Spanish) or Araba (), officially Araba/Álava, is a province of Spain and a historical territory of the Basque Country, heir of the ancient Lordship of Álava, former medieval Catholic bishopric and now Latin titular see.
Its ca ...
, in the
Basque Country. It grows in less than 200 trees on the banks of the
Bayas river. The species is critically endangered, and was added in 2013 to the Basque Catalog of Threatened Species.
References
Orthotrichales
Endemic flora of Spain
Plants described in 1999
{{Bryophyte-stub