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Niebla caespitosa
''Niebla caespitosa'' is a fruticose lichen that grows along the fog regions of the Pacific Coast of North America from southern California, including the Channel Islands, to the Vizcaíno Peninsula of Baja California. The epithet, ''caespitosa'', is in regard to the clustered thallus branches spreading widely from a central attachment or holdfast〔Spjut, R. W. 1996. ''Niebla'' and ''Vermilacinia'' (Ramalinaceae) from California and Baja California. Sida Bot. Misc. 14〕
==Distinguishing Features==
''Niebla caespitosa'' is recognized by the thallus divided into broad strap-like contorted branches that arise from a central basal attachment area, the outer branches wide spreading, the inner more erect, usually dilated or irregularly widened and flattened towards apex, occasionally dividing, and often with short broad lobes. Black dot-like pycnidia are common along the margins of the upper parts of branches and lobes and in between the margins on the prominent reticulate ridges. The contortion of the branches is due to the relatively thinner cortex, usually 45–75 µm thick, in contrast to that of ''Niebla testudinaria'', a similar species, which its branches appear less contorted due to a relatively thicker cortex, 75–150 µm thick. Lichen substances are divaricatic acid with unidentified accessory triterpenes and near base pigments are evident by the blackened cortex. Other similar species are ''Niebla flabellata'', distinguished by containing the lichen substance salazinic acid, and ''N. spatulata'', distinguished by containing hypoprotocetraric acid.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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