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Parmotrema subtinctorium (Zahlbr.) Hale
Family: Parmeliaceae
[Canomaculina subtinctoria (Zahlbr.) Elix,  more]
Parmotrema subtinctorium image
Stephen Sharnoff  
lobes: narrow, sublinear to subirregular, contiguous to imbricate, elongate, plane, separate, 7-13 mm wide; tips: rotund, sparsely to moderately ciliate; cilia: simple, black, up to 4 mm long upper surface: mineral gray (but turning buff in herbarium), smooth but cracked with age, shiny, becoming rimose, strongly effigurate maculate, becoming rugose isidia: cylindrical, simple to coralloid branched, laminal, rarely ciliate apically; soredia and pustulae absent medulla: white lower surface: pale brown to dark brown in center, densely rhizinate, rhizines black, simple Apothecia: rare, 3-8 mm diam.; margin: isidiate; disc: imperforate when young asci: clavate, 8-spored ascospores: ellipsoid, 8-11 x 5-8 um Pycnidia: laminal, immersed conidia: cylindrical-fusiform, 4-7 x 1 micro meter Spot tests: cortex K+ yellow, C-, KC-, P+ yellow; medulla K+ yellow turning dark red, C-, KC-, P+ orange Secondary metabolites: upper cortex with atranorin and chloroatranorin (both major) and usnic acid (accessory); medulla with salazinic acid (major), consalazinic acid and norlobaridone (both minor) and protolichesterinic acid (accessory). Substrate and ecology: frequent on bark in woodlands, rare on rock World distribution: pantropical and into adjacent temperate regions; North America, Europe, Asia and Australasia Sonoran distribution: common on boulders and canyon walls in mid-montane habitats from SE Arizona south through the Sierra Madre Occidental in Chihuahua, Sonora and Sinaloa and in the mountains of southern Baja California Sur. Notes: The chemistry profile basically corresponds to Hale's (1977) interpretation for the species (e.g. see discussion under Parmotrema neotropicum, p. 438). Earlier reports (Hale 1965) of cryptochlorophaic acid was a misidentification of norlobaridone.
Parmotrema subtinctorium image
Stephen Sharnoff  
Parmotrema subtinctorium image
Stephen Sharnoff  
Parmotrema subtinctorium image
Stephen Sharnoff  
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image
Parmotrema subtinctorium image