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Xanthomendoza montana (L. Lindblom) Sochting, Karnefelt & Kondratyuk  
Family: Teloschistaceae
Xanthomendoza montana image
Stephen Sharnoff  
Thallus: foliose, forming small rosettes up to 3 cm wide, adnate, lobate lobes: dorsiventral, flattened to convex, 0.2-0.5 mm wide; tips: rotund to somewhat pointed, often slightly involute, 0.1-0.4 mm wide upper surface: yellow to orange, smooth to shiny, not sorediate medulla: white, reticulate, with short hyphae lower surface: white, smooth or somewhat wrinkled, with short to long, white to yellow rhizines Apothecia: common, laminal, stipitate, up to 4 mm in diam.; margin: smooth, mostly with short cilia; disc: orange; epihymenium: brown, c. 10 Ám thick hymenium: hyaline below, 60-95 Ám tall; paraphyses: simple or branched, cylindrical, septate; hypothecium: hyaline to pale brown, 10-65 Ám thick asci: clavate, 8-spored ascospores: oblong to ellipsoid, polarilocular, hyaline, 12-17 x 4.5-8 Ám; septum: 1-4(-6) Ám wide Pycnidia: common, immersed to protruding, darker than the upper surface conidia: bacilliform, 2.8-5 x 1-1.5 Ám Spot tests: upper surface K+ purple, C-, KC-, P- Secondary metabolites: parietin (major), fallacinal (major), emodin, teloschistin (major) and parietinic acid. Habitat and ecology: on bark, rarely on detritus, often in dry microclimates, such as montane regions World distribution: temperate regions in North America Sonoran distribution: Arizona, at intermediate to fairly high elevations. Notes: The density and length of rhizines and cilia vary considerable in X. montana. Xanthomendoza montana is similar to X. hasseana; see notes for that species for distinctions. Xanthoria polycarpa has more convex and narrower lobes as well as smaller, ellipsoid conidia.
Xanthomendoza montana image
Xanthomendoza montana image
Xanthomendoza montana image
Xanthomendoza montana image
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