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''Niebla flabellata '' is a fruticose lichen that grows on rocks along the foggy Pacific Coast of Baja California in the Northern Vizcaíno Desert, from San Fernando Canyon to the northern shore of the Vizcaíno Peninsula west to Cedros Island.〔Spjut, R. W. 1996. ''Niebla'' and ''Vermilacinia'' (Ramalinaceae) from California and Baja California. Sida Bot. Misc. 14〕 The epithet, '' flabellata '' is in reference to the flattened branches of the thallus. ==Distinguishing Features== ''Niebla flabellata '' is characterized by a fragile thallus divided into irregularly flattened branches spreading from a holdfast, to 7 cm high and 6 cm across, and by containing the lichen substance salazinic acid (without triterpenes; with consalazinic acid, sabrosin derivative), and by its relatively thin cortex, 25–50 µm thick, in contrast to 45–75 µm thick in ''Niebla josecuervoi'', which also differs by the cylindrical-prismatic branches.〔 The branches of ''N. flabellata'' rarely show any definite shape, varying from almost entirely ribbon-like, to often partly ribbon-like with irregularly dilated parts, or mostly dilated and variously torn along the margins. Black dot like pycnidia are common and conspicuous along the branch margins, on the cortical ridges, and at the branch tips, undoubtedly due to the relatively thin cortex.〔 The species will mostly likely be confused with ''Niebla effusa'', one that differs by having a rigid thallus that grows on ground instead on rocks, features that are associated with a thicker cortex (35–75 µm thick) and by the absence of a central attachment holdfast (in spreading over the ground).〔 ''Niebla flabellata'' is one of the common pebble lichens in the ''Niebla'' communities found along the northern coastal peninsula of Baja California south of Campo Nuevo,〔''Niebla'' and ''Vermilacinia'' Communities, Richard W. Spjut, World Botanical Associates, retrieved 22 Dec 2014; http://www.worldbotanical.com/niebla_communities.htm〕 but it also occurs on rocks of canyon walls of arroyos, and on calcareous ridges.〔 On Cedros Island, and in the Sierra Hornitos on the Vizcaíno Peninsula, and near Rosarito towards the southern end of the northern peninsula of Baja California, ''Niebla spatulata'' is recognized as a rare species that occurs with ''N. flabellata''. It differs by having the lichen substance hypoprotocetraric acid. The two species appear to represent one of the few examples of sibling species in the genus.〔Culberson, W. L. 1986. Chemistry and sibling speciation in the lichen-forming fungi: Ecological and biological considerations. The Bryologist 89:123-131〕 Also along the northern Vizcaíno Peninsula is ''Niebla limicola'', a species that has the flattened branch morphology of ''N. flabellata'', the short bifurcate branchlets of ''Niebla arenaria'', and the terricolous lichen habit of ''Niebla effusa'', all which contain salazinic acid. It is found mainly along the barren tidal flats and on dunes with coastal salt scrub.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Niebla flabellata」の詳細全文を読む スポンサード リンク
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