juniper skin lichen
Leptogium juniperinum
Description 2
Thallus: foliose, 0.5-4 cm in diam., adnate, subdichotomously to irregularly lobate; lobes: irregular, elongate, plane to suberect, separate and often imbricate, 2-3 mm wide, 45-115 µm thick; apices: rotund, entire to irregularly cut or lobulate, often ascending; upper surface: medium gray to brown or olivaceous brown, dull to shiny, smooth, not isidiate; internal anatomy: with upper and lower cortices consisting of a single layer of irregularly isodiametrical cells 5-9 µm in diam., internally with loosely interwoven chains of Nostoc and hyphae; lower surface: pale gray or brown, smooth, with scattered tufts of white hairs; Apothecia: common, laminal, sessile to short stipitate, 0.2-2 mm wide; disc: light brown to red-brown, concave; margin: thalline, concolorous with the thallus, entire to minutely lobulate; exciple: euparaplectenchymatous but obscure centrally, 10-35 µm thick centrally; hymenium: hyaline below and thinly yellow to brown above, 75-115 µm tall; paraphyses: unbranched, c. 1.5 µm wide, slightly inflated apically; subhymenium: pale yellow, 25-45 µm thick; asci: cylindrico-clavate, 8-spored; ascospores: hyaline, submuriform, 3-septate transversely, 0-1-septate longitudinally, ellipsoid to subfusiform, 12-23 x 5-9 µm; Pycnidia: not observed; Spot tests: all negative; Secondary metabolites: none detected.; Substrate and ecology: usually on soil, often among mosses over calcareous rocks, more rarely on base of junipers and other shrubs; World distribution: widely scattered in North America; Sonoran distribution: Arizona and Chihuahua.; Notes: Leptogium juniperinum is a small species in the L. azureum group, characterized by its small size and its medium gray to brown color, as well as the habitat.
Fuentes y créditos
- (c) National Museum of Natural History Collections, algunos derechos reservados (CC BY-NC-SA), https://collections.nmnh.si.edu/services/media.php?env=botany&irn=10613752
- (c) Lichen Unlimited: Arizona State University, Tempe., algunos derechos reservados (CC BY-NC-SA), http://eol.org/data_objects/10548294
