Family: Collemataceae
[ Collema rupestre (Sw.) Rabenh. , more, Collema rupestre f. corticola Räsänen, Collema rupestre f. granulosum (Grognot) Zahlbr., Collema rupestre f. rupestre (Sw.) Rabenh., Collema rupestre var. rupestre (Sw.) Rabenh., Collema rupestre var. subfurvum (Müll.Arg.) Zahlbr., Collemodiopsis flaccidum (Ach.) Hav., Eucollema flaccidum (Ach.) Horw., Gabura flaccida (Ach.) Kuntze, Lathagrium flaccidum (Ach.) Gray, Lathagrium rupestre (Sw.) A. Massal., Lathagrium rupestre f. granulosum (Grognot) Szatala, Lathagrium rupestre f. rupestre (Sw.) A. Massal., Lethagrium flaccidum (Ach.) Arnold, Lethagrium rupestre (Sw.) A. Massal., Lichen flaccidus Ach., Parmelia flaccida (Ach.) Ach., Parmelia flaccida var. flaccida (Ach.) Ach., Parmelia rupestris (Sw.) F. Desp., Parmelia rupestris var. flaccida (Ach.) Schaer., Synechoblastus flaccidus (Ach.) Körb., Synechoblastus flaccidus var. flaccidus (Ach.) Körb., Synechoblastus flaccidus var. laeve Müll.Arg., Synechoblastus flaccidus var. subfurvus Müll.Arg., Synechoblastus rupestris (Sw.) Trevis.] |
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2. Thallus: foliose, medium-sized to large, 2.5-6 cm wide, thin, membrane-like, ±rounded, loosely attached, broadly and ±deeply lobate lobes: 0.5-1.5(-3) cm wide, thin (70170 µm), not swollen, few, ±rounded, often partly ascending, imbricate, radially or irregularly folded; margins: ±entire, sometimes revolute or ascending upper surface: smooth to slightly pustulate, black, usually dull isidia: numerous, often crowded, laminal, at first globose but soon flattened and scale-like lower surface: usually paler than upper surface, pale gray or blue, sometimes folded or ridged Apothecia: rare, laminal, sessile with constricted base, 1.5(-2.5) mm wide disc: flat to slightly convex, pale or dark red, usually dull, smooth, epruinose or sometimes pruinose when old thalline margin: smooth, usually not prominent, with thick, 40-90 µm wide pseudocortex, especially at lower parts true exciple: rather thin, subparaplectenchymatous to nearly euthyplectenchymatous hymenium: hyaline, 90-130 µm tall asci: narrowly clavate, 8-spored ascospores: hyaline, ellipsoid to fusiform, 4-6-celled, not constricted at septa, (20-)26-34(-40) x 6-6.5 µm Pycnidia: immersed, laminal, pale conidia: bacilliform or with slightly swollen ends, (3-)4-4.5(-6) x 1-1.5(1.8) µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on bark or damp rock (usually siliceous), often among mosses, in mountainous regions World distribution: from the arctic to southern temperate areas of Europe, Asia and North America, northern Africa, Near East, India, Oceania, and Australia Sonoran distribution: central and southeastern Arizona above 1500 m. Notes: Collema flaccidum is distinguished by its large, broad-lobed thallus with distinct ridges and scale-like isidia. Collema subflaccidum lacks distinct ridges and has small, globular isidia. |