Cetraria

Cetraria is a genus of fruticose lichens that associate with green algae as photobionts. Most species are found at high latitudes, occurring on sand or heath. Species have a characteristic "strap-like" form, with spiny lobe edges.

Cetraria islandica, Iceland moss, is one of the few culinary lichens, ground and eaten by Northern Europeans in times of famine.

Another species is used today as a "bulking" agent in garam masala of traditional Indian cuisine.

Species

 * Cetraria aculeata (Schreb.) Fr. (1826)
 * Cetraria arenaria Kärnefelt (1977)
 * Cetraria australiensis W.A.Weber ex Kärnefelt (1977)
 * Cetraria corrugata (R.F.Wang, X.L.Wei & J.C.Wei) Divakar, A.Crespo & Lumbsch (2017)
 * Cetraria endochrysea (Lynge) Divakar, A.Crespo & Lumbsch (2017)
 * Cetraria ericetorum Opiz (1852)
 * Cetraria flavonigrescens (A.Thell & Randlane) Divakar, A.Crespo & Lumbsch (2017)
 * Cetraria isidiigera (Kurok. & M.J.Lai) Divakar, A.Crespo & Lumbsch (2017)
 * Cetraria islandica (L.) Ach. (1803)
 * Cetraria kamczatica Savicz (1914)
 * Cetraria laevigata Rass. (1943)
 * Cetraria minuscula (Elenkin & Savicz) McCune (2018)
 * Cetraria muricata (Ach.) Eckfeldt (1895)
 * Cetraria nigricans Nyl (1859)
 * Cetraria odontella (Ach.) Ach. 1814)
 * Cetraria racemosa (Lynge) Øvstedal (2009)
 * Cetraria sepincola (Hoffm.) Ach. (1803)
 * Cetraria sinensis (X.Q.Gao) Divakar, A.Crespo & Lumbsch (2017)
 * Cetraria wangii Divakar, A.Crespo & Lumbsch (2017)
 * Cetraria weii Divakar, A.Crespo & Lumbsch (2017)

The species once known as Cetraria subscutata D.C.Linds. (1973) was placed into synonymy with Nephromopsis chlorophylla.