The lichen genus Ramalina (Ramalinaceae) in Alberta, Saskatchewan and Manitoba

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Representatives of the lichen genus Ramo.Zina (Ramalinaceae) occurring within Alberta) Saskatchewan, and Manitoba are separated into 13 species based on the combined morphological and chemical analysis of 13,000 specimens collected within the study area by the author, supplemented by 2,300 additional specimens acquired on loan from various institutions within Canada and the United States. The species ·include 1 circumpolar, Hemiarctic-8or2al species [Ramalina roesleri (Hochst.) Nyl.], 1 circumpolar, Boreal-Foothills Cordilleran species [?. t ~~austa (Ach.) Nyl.], 4 circumpolar, Boreal-Foothills Cordilleran -Northern Temperate species [R. rninuscuZa (Nyl.) Nyl., R. obtusata (Ar-n.) Sitt., P. pollinc2•{a, (Westr.) Ach., andR. sinensis Jatta], l circumpolar, Boreal-Southern Cordilleran-Northern Temperate species [.2. r(ntermedia (Del. ex Nyl.) Nyl.], 2 circumpolar-perioceanic, Borea1 -Temperate species [R. hypopziotocetrarica H. Culb. and R. reagens (B. de Lesd.) W. Culb.], 1 North American, Southern Boreal-Eastern Teffiperate species [R. aspereZla Wylie], l North American, Eastern Temperate species [Re integra Wylie], l Western Boreal-Foothills Cordilleran species [R. fil-igrana Wylie], and l Uppe r Foothills Cordilleran species [R. s,juncta Wylie]. Four allied taxa including 2 circumpolar-perioceanic, Southern Boreal-Temperate species [? . bonsaia Wylie and R. infZata Hook. f. &Tayl.], 1 circumpolar -perioceanic, Boreal-Temperate species [R. farinacea (L.) Ach.], and 1 North American, Southern Boreal-Eastern Temperate species [R. calcm"' Hylie] from adjacent provinces are also reviewed. Six taxa are new to science. Of the 37 primary and accessory chemical constituents described, 20 are first records for the genus. The rare, structurally unique orcinol depsidone, variolaric acid, occurred in two species. The concentrations, indicator reactions, ,and known structure of all natural products cited are given. Within the Ramalina species studied, striking gradients in thallus height, width, and growth form are common between taxon members growing in slightly different habitats. More subtle continua in tissue distribution or reproductive emphasis are also found within adjacent thalli of the same species. All taxa reviewed were dependent on continued sources of high humidity. The majority of species were widespread, but highly localized in occurrence and indiscriminatingly inhabited substrates offering moist environments. All Ramalina populations studied were mature forest indicators when corticolous, and uniformly sensitive to competitive and limiting factor inhibition throughout their known range in the Prairie provinces.
Bibliography: p. 600-642.
Wylie, M. E. (1977). The lichen genus Ramalina (Ramalinaceae) in Alberta, Saskatchewan and Manitoba (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from doi:10.11575/PRISM/17591