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 Add this item to the list  Lecania erysibe (Ach.) Mudd
Page number:409 
Description type:Non-original description 
Description:Lecania erysibe (Ach.) Mudd
Man. Br. Lich. 141 (1861) Lichen erysibe Ach., "Habitat ad asseres semiputridos", Lich. suec. Prod. 50 (1799), Lecidea erysibe (Ach.) Ach., Meth. Lich., 62 (1803), Lecidea luteola var. erysibe (Ach.) Ach., Nova Acta Reg. Acad. Sci. Holmiae XXIX:266 (1808), Biatora erysibe (Ach.) Fr., Kgl. Vetensk. Akad. Nya Handl., 265 (1822), Lecanora erysibe (Ach.) Nyl., Mem. Soc. Sci. Nat. Cherbourg, vol. III:179 (1855). Type: without information of collection site, "Lecidea luteola var. erysibe" (BM-ACH lectotype selected by Mayrhofer 1985 [publ 1988], not seen).
Illustrations. - FIGS. 4D (spores), 5D (paraphyses).
Characterization. - Thallus relatively thick, areolate, densely blastidiate. Apothecia orange-brown to dark brown, 0.27-0.57 mm diam, adpressed to sessile, flat to slightly convex. Thalline margin persistent, blastidiate. Hymenium 49-62 µm thick. Spores ellipsoid, 1-septate, 9.7-12.2 x 2.9-3.8 µm. Similar to L. leprosa but differs in absence of the pigment Hertelii-green, longer, narrower spores, a tendency to a thicker hymenium and a more greenish thallus. Also similar to L. sordida but differs in having a densely blastidiate thallus, a thicker hymenium and nonswollen paraphysis apices.
Morphology. - Thallus usually relatively thick but sometimes thin, areolate, densely blastidiate; gray-green, pale brownish green or greenish gray-brown. Apothecia (0.20-)0.27-0.41-0.57(-0.82) mm diam (s = 0.13, N = 9, n = 10), adpressed to the areola or more sessile when the thallus is thinner, flat or slightly convex. Disk pale brown, orange-brown, red-brown, or dark brown; bright pale brown, red-brown, or orange-brown with dark pigment spots when wet. Thalline margin of the same color as thallus, persistent, blastidiate, contains algal cells; medulla hyaline or pale brown. Hypothecium hyaline. Hymenium (44-)49-56-62(-74) µm thick (s = 6.2, N = 9, n = 5), hyaline or pale brown. Epihymenium pale brown to brown. Paraphyses somewhat conglutinated, the terminal cell not or only slightly swollen (to 3 µm wide). Spores hyaline, ellipsoid, straight, 1-septate, (8.1-)9.7-11.4-12.2(-14.7) µm long (s = 1.6, N = 9, n = 10), (2.9-) 2.9-3.4-3.8(-4.1) µm wide (s = 0.4, N = 9, n = 10).
Chemistry. - All spot tests of thallus and apothecia negative. Epihymenium usually contains a pale brown or brown pigment that reacts K+ weakly reddish.
Ecology. - Saxicolous, rarely lignicolous. Lecania erysibe occurs on nutrient-enriched habitats including on mortar, brick, concrete and limestone, but it also occasionally occurs on decaying wood or bark.
Distribution. - France, W Germany, The Netherlands, Belgium, British Isles, Denmark, Sweden, Faroe Islands, western North America, Australia.
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