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Scytinium platynum (Tuck.) Otálora, P. M. Jørg. & Wedin (redirected from: Leptogium platynum)
Family: Collemataceae
[Leptogium platynum (Tuck.) Herre]
Scytinium platynum image
Stephen Sharnoff  
Thallus: foliose, 1-7 cm in diam., adnate, subdichotomously to irregularly lobate lobes: irregular, elongate, +plane, thick, separate to often imbricate, 1-6 mm wide, 150-250(-500) µm thick; with an ascending margin; apices: rotund, usually entire to irregularly cut or lobulate, occasionally upturned upper surface: medium gray or bluish gray to brown or blackish brown, usually dull, distinctly and irregularly wrinkled, 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 to medium gray or brown, wrinkled, with scattered tufts of white hairs Apothecia: common, laminal, sessile to short stipitate, 0.2-0.5 mm wide disc: brown, concave to plane margin: thalline, concolorous with the thallus, entire exciple: euparaplectenchymatous, 10-45 µm thick centrally hymenium: hyaline below and thinly yellow above, 170-220 µm tall; paraphyses: unbranched, c. 1.5 µm wide, slightly inflated apically; subhymenium: yellow to pale brown, 25-70 µm thick asci: cylindrico-clavate, 8-spored ascospores: hyaline, muriform, 7-9-septate transversely, 1-2-septate longitudinally, ellipsoid to subfusiform, 35-48 x 9-16 µm Pycnidia: not observed Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on soil or rocks World distribution: western North America and India Sonoran distribution: southern California and Chihuahua. Notes: Leptogium platynum is robuster and thicker than L. californicum or L. gelatinosum and has generally larger spores than those two species.
Scytinium platynum image
Stephen Sharnoff  
Scytinium platynum image
Stephen Sharnoff  
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image
Scytinium platynum image