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Vermilacinia cedrosensis : ウィキペディア英語版 | Vermilacinia cedrosensis
==General Features== ''Vermilacinia cedrosensis'' is a pale fruticose lichen endemic to Baja California, Mexico, occurring on Cedros Island, the Vizcaíno Peninsula, and north along the main peninsula of the northern Baja California coast mountains to near Punta San Carlos. The species is usually found inland from the immediate coastal environment in wind-sheltered microenvironments, which may be leeward sides of small stones or rock ledges on vertical rock walls in narrow arroyos〔Spjut, R. W. 1996. ''Niebla'' and ''Vermilacinia'' (Ramalinaceae) from California and Baja California. Sida Miscellany 14〕 ''Vermilacinia cedrosensis'' is classified in subgenus ''Vermilacinia'' in which it is distinguished by its whitish to pale yellowish green thallus divided into flexuous tubular-prismatic branches arising from a holdfast.〔A holdfast in Ramalinaceae appears like a thickened circular plate from which branches arise.〕 The primary branches, generally less than 20 in number, and although usually curved, grow up to 6 cm in length and from 5 to 15 mm in width. They occasionally divide into equal secondary branches, usually well above the thallus base. Occasionally near apex are clusters of cupular apothecia, or rarely many short branches spreading radially. The cortex is generally thinner than in the other species of the subgenus,(0–25 µm thick), especially thinning towards apex as seen by the exposed medulla, which adds white color to the branches, and is also generally creased and shallowly depressed. Pycnidia commonly appear as colorless pits in the cortex of upper half of branches, often with black pycnidia that develop to branch apices. Lichen substances are primarily three terpenes characteristic of the subgenus ''Vermilacinia'', an unknown referred to as “T3”, bourgeanic acid, the diterpene (-)-16 α-hydroxykaurane, and the triterpene zeorin. Accessory lichen substances are often present, which may include any or all of the following: salazinic acid, an unknown terpenoid compound (“T4”) and usnic acid.〔
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