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Niebla dactylifera
''Niebla dactylifera'' is a fruticose lichen that grows only on San Nicolas Island in the Channel Islands of California. The epithet, ''dactylifera'', is in reference to the terminal finger-like branches.〔Spjut, R. W. 1996. ''Niebla'' and ''Vermilacinia'' (Ramalinaceae) from California and Baja California. Sida Bot. Misc. 14〕
==Distinguishing Features==
''Niebla dactylifera'' is recognized by the thallus divided into tubular-prismatic branches that arise from a thick basal attachment area; the branches, which are not more than 3.0 cm high, become widened above similar to the palm of a hand from which develop many shorter finger like branches. The cortex is not more than 75 µm thick, in contrast to that of ''Niebla dissecta'', 75–110 µm thick, a similar species that further differs by a more regularly branched thallus, one that is also broader at the base than above the base. Black dot-like pycnidia are infrequent and inconspicuous at tips of the ultimate branches. The key lichen substances is sekikaic acid, with accessory triterpenes. Pigmentation is weak near base of thallus, the cortex appearing brownish with blackish areas.〔
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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