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Parmelina tiliacea (Hoffm.) Hale  
Family: Parmeliaceae
[Imbricaria scortea (Ach.) Jatta, moreImbricaria tiliacea (Hoffm.) Flot., Lichen scorteus Ach., Lichen tiliaceus Hoffm., Lobaria tiliacea (Hoffm.) Hoffm., Parmelia scortea (Ach.) Ach., Parmelia scortea f. borealis Norman, Parmelia scortea f. coerulescens Harm., Parmelia scortea f. euscortea Maas Geest., Parmelia scortea f. melanoblepharis Hillmann, Parmelia scortea f. obscurior (Hillmann) Hillmann, Parmelia scortea f. pruinosa Harm., Parmelia scortea f. ramifica (Gyeln.) Motyka, Parmelia scortea f. scortea (Ach.) Ach., Parmelia scortea f. visegradensis Gyeln., Parmelia scortea var. feracissima (Müll. Arg.) Harm., Parmelia scortea var. papillosa Gyeln., Parmelia scortea var. ramifica Gyeln., Parmelia scortea var. scortea (Ach.) Ach., Parmelia tiliacea (Hoffm.) Ach., Parmelia tiliacea f. asperata Müll.Arg., Parmelia tiliacea f. borealis Norman, Parmelia tiliacea f. minor Kremp., Parmelia tiliacea f. obscurior Hillmann, Parmelia tiliacea f. pruinosa Harm., Parmelia tiliacea f. tiliacea (Hoffm.) Ach., Parmelia tiliacea subsp. carporrhizans (Taylor) Nyl., Parmelia tiliacea subsp. tiliacea (Hoffm.) Ach., Parmelia tiliacea var. affixa Stirt., Parmelia tiliacea var. carporrhizans (Taylor) Flagey, Parmelia tiliacea var. convexula Müll.Arg., Parmelia tiliacea var. efflorescens Müll.Arg., Parmelia tiliacea var. eximia J. Steiner, Parmelia tiliacea var. feracissima Müll.Arg., Parmelia tiliacea var. flavicans Tuck., Parmelia tiliacea var. hypoleuca Müll.Arg., Parmelia tiliacea var. meizospora Nyl., Parmelia tiliacea var. minor Müll.Arg., Parmelia tiliacea var. rimulosa Müll.Arg., Parmelia tiliacea var. rugulata Müll.Arg., Parmelia tiliacea var. rugulosa Leight., Parmelia tiliacea var. scortea Ach., Parmelia tiliacea var. stenophylla Müll.Arg., Parmelia tiliacea var. sulphurosa Tuck., Parmelia tiliacea var. tiliacea (Hoffm.) Ach., Parmelina tiliacea f. tiliacea (Hoffm.) Hale, Platysma tiliaceum (Hoffm.) Frege]
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  • North Carolina Biodiversity Project
  • Resources
North Carolina Biodiversity Project
MB# 342999

TYPE. “Habitat in variis Europae arboribus praefertim Tilia, nec non in rupibus et tectorum tegulis.” (Hoffman 1784).

Description. Life form: lichenized fungus.

[Moddified from Louwhoff 2009] Thallus foliose, 4-8(-20) cm diam., loosely to moderately attached; lobes 5-10 mm wide, radiating, contiguous but often overlapping along margins and centrally, undulating towards center; margins broadly rounded but irregularly-indented, sparsely short ciliate in axils. Upper surface mineral grey to grey, ± faintly pruinose towards apices, faintly pale maculate, isidiate. Isidia pale brown to grey-brown, laminal, scattered or densely covering central lobes, cylindrical to clavate, simple or coralloid, often crowded and forming a ± continuous crust. Lower surface black, brown towards lobe margins; rhizines continuing up to lobe margins, mostly simple. Ascomata lecanorine apothecia, rare, sessile, to 7 mm wide; disk red-brown, perforate or not; thalline rim intact or small-incised, reportedly ± densely rhizinate at or towards the point of attachment. Ascospores simple, hyaline, 9-10 × 6-9 µm., almost spherical to shortly ellipsoid. Pycnidia rare; conidia 4.5 × 1 µm, bacilliform, straight or slightly curved.

Chemistry. Cortex K+ yellow; medulla UV–, K–, KC+ red, C+ red, Pd–; atranorin, lecanoric acid.

Substrate and Habitat. Corticolous on hardwood trees and saxicolous on siliceous rocks in exposed areas.

Distribution. Cosmopolitan; in North Carolina found in Blue Ridge and Piedmont ecoregions.

Literature

Hoffmann, G.F. 1784. Enumeratio Lichenum. 102 pp (original description as Lichen tiliaceus).  

Louwhoff, S.H.J.J. (2009) Parmelina Hale (1974). Pp. 657-658 in Smith, C.W., A. Aptroot, B.J. Coppins, A. Fletcher, O.L. Gilbert, P.W. James & P.A. Wolseley (eds.). The Lichens of Great Britain and Ireland. The British Lichen Society, London.

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This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394
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