Cetrelia monachorum:

preview-picture	description	comment
	Cetrelia monachorum Blackwater-valley, Tyrol, October 2009, Wagner 79	Habitusfoto. On sycamore maple. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum Hornbach-valley, Tirol, October 2008, Wagner 27	The white, dot-like pseudocyphelles on the leaf are characeristic. Pseudocyphelles are white, dot- or linear openings. They serve for gas-exchange and often they are the starting points of sorales. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum Hornbach-valley, Tirol, October 2008, Wagner 27	The border-sorales are a further identifying characteristic. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum Hornbach-valley, Tirol, October 2008, Wagner 27	The backside is brown at the border and black at the inner part. The brown border shows no rhizines in the black, inner part there are some single, short peaked rhizines. In contrast to Cetrelia cetrarioides mostly there are no pseudocyphellae on the underside of Cetrelia monachorum. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum Hornbach-valley, Tirol, October 2008, Wagner 27	Lobe, cross section. Typical body of a foliose lichen: on top a brown cortex of fungal-hyphae, followed by the layer of symbiontic green algae and beneath a layer of loose ordered fungal-hyphae. At the bottom again a black cortex layer. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum Jochbach-valley, Tyrol, October 2009, Wagner 78	Apothecium. Disc brown to red brown, Lecanora-type. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum Jochbach-valley, Tyrol, October 2009, Wagner 78	Cross section apothecium. Staining with Lactophenol-Methylblue-Acidfuchsin. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum Jochbach-valley, Tyrol, October 2009, Wagner 78	Ascus of Lecanora type, 55 x 33 µm, apex with with K/J+ blue annulus. Spores simple ellipsoid, 8 per ascus, 14 x 9 µm. Staining with Lugol. Microscopy, Stereomicroscope, Microfoto
	Cetrelia monachorum and Cetrelia olivetorum TLC in Toluene + Acetic acid (20 ml + 3 ml) on Merck Silica Gel 60 F254 5 x 20 cm plate; UV-365nm, after treatment with 10 % sulfuric acid.	1: Cetrelia monachorum; Wagner 27 2: Cetrelia monachorum; Wagner 78 3: Cladonia symphycarpa; Schumm 4698 + Platismatia glauca; Schumm 3030 4: Cetrelia monachorum; Wagner 79 5: Cetrelia monachorum; Wagner 80 6: Cetrelia olivetorum; Wagner 81 a = atranorin; pt = perlatolic acid, im = imbricaric acid; an = anziaic acid; 4dmi = 4-O-demethylimbricaric acid; ol = olivetoric acid Cetrelia monachorum is identified by its content of imbricaric acid and 4-O-demethylimbricaric acid. Lit.: OBERMAYER, W. & MAYRHOFER, H. 2007: Hunting for Cetrelia chicitae (lichenized ascomycetes) in the Eastern European Alps (including an attempt for a morphological characterization of all taxa of the genus Cetrelia in Central Europe). – Phyton (Horn) 47: 231– 290. Microscopy, Stereomicroscope, Microfoto