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Lathagrium fuscovirens (With.) Otálora, P.M. Jørg. & Wedin   (redirected from: Collema fuscovirens (With.) J. R. Laundon)
Family: Collemataceae
[Collema flaccidum var. microlobum Nyl. ex Leight., moreCollema furvum (Ach.) DC., Collema furvum f. conchilobum (Flot.) Müll. Arg., Collema furvum f. furvum (Ach.) DC., Collema furvum f. tunaeformis (Ach.) Nyl., Collema furvum f. tuniforme (Ach.) Nyl., Collema furvum f. verruciforme Ach., Collema fuscovirens (With.) J. R. Laundon, Collema granuliferum f. meizolobum (Nyl. ex Cromb.) Nyl. ex Leight., Collema subplicatile f. meizolobum Nyl. ex Cromb., Collema tuniforme (Ach.) Ach. em Degel., Lichen fuscovirens With., Lichen tuniforme Ach.]
Lathagrium fuscovirens image
Matthias Schultz
  • Greater Sonoran Desert
  • Resources
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, 3-5 cm wide, ±rounded or irregular, deeply and broadly lobate lobes: 2-5 mm wide, (70-)110-200(-300) µm thick, rather few, extended, often repeatedly branched, broadly canaliculated; tips: ±rounded, margins not swollen, coarsely undulate, entire to slightly crenate upper surface: dark olive-green to black, paler and ±transparent when moist, smooth to somewhat pustulate, usually dull, epruinose isidia: laminal, rarely marginal, often numerous, globular, occasionally clavate or cylindrical, not or barely branched, up to 0.3 mm broad, concolorous with thallus or somewhat darker lower surface: paler, grayish or bluish, with scattered or confluent hapters or rhizines forming a down Apothecia: numerous or sparse, laminal, sessile, finally with constricted base, 0.5-1.5(-2) mm wide disc: plane or concave to convex, red-brown or dark red, smooth, sometimes glossy, epruinose thalline margin: ±thick, entire, smooth, or isidiate, lacking a pseudocortex true exciple: euparaplectenchymatous, 45-110 µm thick; cells: (6.5-)10-20(-30) hymenium: hyaline, 85-130 µm tall asci: clavate, 8-spored ascospores: hyaline, ellipsoid to ovoid or subglobose, ends obtuse or ±acute, submuriform to muriform, often with 3 transverse and 1 longitudinal septa, 1524(-28) x 6.5-13(-15) µm Pycnidia: laminal or marginal, immersed or semi-immersed, pale conidia: bacilliform or with slightly swollen ends, 4.5-6 x 1.5 µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: usually on periodically moistened calcareous or siliceous rocks or on mosses over rock (not observed in the Sonoran Region), in the mountains World distribution: arctic to temperate areas of Europe, Asia and North America, and extending to northern Africa, the Near East, and India Sonoran distribution: Arizona, and southern California. Notes: Collema undulatum var. granulosum is very similar to Collema fuscovirens in having undulate, isidiate lobes, but its lobes are somewhat broader (up to 8 mm) and its spores are bacilliform with obtuse poles and 4-celled. Col-lema subflaccidum occurs on bark and rock, its lobes are flat or somewhat ascending but not undulate and its isidia are more slender (0.05-0.1 mm).
Lathagrium fuscovirens
Open Interactive Map
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Lucy Taylor
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Andrew Khitsun
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This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394
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