Hypotrachyna osseoalba, commonly known as the grainy loop lichen, is a species of foliose lichen in the family Parmeliaceae. It is widely distributed in subtropical and temperate areas of the world. Characteristic features of the lichen include the pustules in its cortex, the somewhat linear shape of the lobes comprising the thallus, and the branched rhizines (holdfasts on the thallus underside).
The taxon Parmelia formosana, described by Alexander Zahlbruckner in 1934,[3] later became Hypotrachyna formosana after Hale transferred it to Hypotrachyna in 1975.[4] When Hale was later working on a monograph of genus Xanthoparmelia, he studied the type material of Vainio's Parmelia osseoalba, and determined that it was identical both chemically and morphologically to Hypotrachyna formosana. Because of this, the name used by Zahlbruckner became a later synonym of Vainio's name.[1]
In North America, Hypotrachyna osseoalba is commonly known as the "grainy loop lichen".[5]
Hypotrachyna osseoalba occurs in subtropical and temperate areas of Asia (South Korea, Japan, Taiwan, and Thailand) Australia, Africa, Central America, South America, and the eastern United States.[1]
References
^ abcdePark, Y.S.; Hale, M.E. (1989). "Hypotrachyna osseoalba, the correct name for Hypotrachyna formosana (Parmeliaceae: lichenized Ascomycotina)". Taxon. 38 (1): 88. doi:10.2307/1220900. JSTOR1220900. S2CID87467062.
^Vainio, E.A. (1921). "Lichenes in summo monte Doi Sutep (circ. 1675 m.s.m.) in Siam boreali anno 1904 a D:re C.C. Hosseo collecti". Annales Botanici Societatis Zoologicae Botanicae Fennicae "Vanamo" (in Latin). 1 (3): 33–55.
^Zahlbruckner, A. (1934). "Flechten der Insel Formosa". Feddes Repertorium Specierum Novarum Regni Vegetabilis (in German). 33 (1–7): 22–68. doi:10.1002/fedr.19330330103.
^Hale, Mason E. A Revision of the Lichen Genus Hypotrachyna (Parmeliaceae) in Tropical America. Smithsonian Contributions to Botany. Vol. 25. pp. 1–73.
^Brodo, Irwin M.; Sharnoff, Sylvia Duran; Sharnoff, Stephen (2001). Lichens of North America. Yale University Press. p. 358. ISBN978-0300082494.