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Lepraria texta K. Knudsen, Elix & Lendemer |
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Nomenclatural data
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In Lichen Flora of the Greater Sonoran Desert Region 3: 387 (2008); type: U.S.A. California, Ventura Co., Santa Monica Mountains, Party Rock, 34°6’37”N 118°54’22”W, 8. Feb. 2006, K. Knudsen 5153 w/, R. Muertter & T. Sagar (UCR—holotypus; ASU, B, CANB, H, PH, UGDA—isotypus).
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Morphology
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Thallus crustose, leprose, with finely granular appearance; green, slightly yellowish; thin to relatively thick, firmly attached to the substrate; shape irregular, continuous; margin diffuse, lobes absent; cortex absent; medulla absent; hypothallus sometimes present, evident, whitish, lower surface absent; areoles absent; squamules absent; thallus surfaces without soredia absent, soredia abundant, fine, up to 50 µm in diam., irregular, relatively densely packed; wall present; projecting hyphae present, short; some soredia not well separated from each-other; isidia-like structures absent.
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Chemistry
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Usnic acid, zeorin (minor), atranorin (major to minor), roccellic/angardianic acid (minor). K± yellow, C–, KC± yellow, Pd–.
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Remarks
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L. coriensis, L. ecorticata, L. straminea, L. usnica and L. leuckertiana also contain usnic acid and usually zeorin, but differ from L. texta in following aspects. L. coriensis and L. usnica have lobes and medulla. L. straminea has corticate granules. L. leuckertiana has cottony appearance with well developed medulla and the soredia are not well separated from one another. Some soredia of L. texta are also not well separated, unlike another similar species L. ecorticata, which soredia are more regular and convex, additionally L. texta can develop hypothallus and obscure minute lobes but L. ecorticata is predominantly unstratified and without any lobes. Usually the appearances of L. texta and L. ecorticata are different.
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Ecology and distribution
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Substrate and ecology: rock. Distribution: North America (California, USA).
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