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Lepraria normandinoides Lendemer and R.C. Harris |
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Nomenclatural data
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Opuscula Philolichenum, 4: 45 (2007); type: U.S.A. North Carolina, Transylvania Co., Nantahala National Forest, Shower Falls, 35° 09' 34"N, 82° 58' 26"W, 29.v.2006, J. C. Lendemer et al. 7001 (NY—holotypus; isotypi distributed in Lichens of Eastern North America V: 221).
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Morphology
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Thallus crustose, leprose, with membranous appearance; bluish-white to greenish-blue or yellowish green; medium to thick, relatively soft, weakly attached to the substrate, partly loose attached to the substrate; shape scattered individual thalli consisting of isolated lobes or a continuous well developed crust with marginal lobes, up to several cm in diam.; margin delimited, lobes usually well developed, with marginal rim; cortex absent; medulla present, whitish, hyphae hyaline; below thallus rhizohyphae present, branching, extending from the medulla, brown, lower surface pale, underlain by thick weft of rhizohyphae; prothallus absent; areoles absent; squamules absent; upper surface soredia held together by a network of gelatinized hyaline hyphae, soredia abundant, fine, 30-60 µm in diam.; projecting hyphae absent; isidia-like structures absent. Photobiont green, coccoid, 7-10μm in diam.
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Chemistry
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This species comprises 3 chemotypes (Lendemer 2007). Common (1): atranorin, protocetraric acid, virensic acid (trace), roccellic acid; K+ yellow, C–, KC+ yellowish, Pd+ orange. Rare (2): atranorin, fumarprotocetraric acid, protocetraric acid (minor to trace), roccellic acid; K+ yellow, C–, KC+ yellowish, Pd+ orange. Very rare (3): atranorin, roccellic acid; K+ yellow, C–, KC+ yellowish, Pd–.
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Remarks
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L. bergensis, L. membranacea, L. normandinoides, L. sipmaniana are morphologically quite similar, see the discussion under L. bergensis. Several species can develop well developed lobes, see the discussion under L. membranacea. Also several species produce protocetraric and/or fumarprotocetraric acids, see the discussion under L. caesioalba.
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Ecology and distribution
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Substrate and ecology: acidic rock, bark; semi-shaded sites with moderate to high humidity. Distribution: eastern North America.
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