. Lichens. Lichens. B Fig. III. Immersed spermogonia. A, globose m Parmelia acetabulum Dub. x 600; B, with infolded walls in Lecidea (Psora) testacea Ach. x 144 (after Gliick). A second series, also immersed, are borne in small protuberances of the thallus. These very prominent forms are rarely found in crustaceous lichens, but they are characteristic of such well-known species as Ramalina fraxinea, Xanthoria parietina, Ricasolia amplissima, Baeomyces roseus, etc. Other sper- mogonia project slightly above the level of the thallus, as in Cladoniapapillaria and Lecidea lurida; while in a few in
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. Lichens. Lichens. B Fig. III. Immersed spermogonia. A, globose m Parmelia acetabulum Dub. x 600; B, with infolded walls in Lecidea (Psora) testacea Ach. x 144 (after Gliick). A second series, also immersed, are borne in small protuberances of the thallus. These very prominent forms are rarely found in crustaceous lichens, but they are characteristic of such well-known species as Ramalina fraxinea, Xanthoria parietina, Ricasolia amplissima, Baeomyces roseus, etc. Other sper- mogonia project slightly above the level of the thallus, as in Cladoniapapillaria and Lecidea lurida; while in a few instances they are practically free, these last strikingly exemplified in Cetraria islandica where they occupy the small projections or cilia (Fig. 112) that fringe the margins of the lobes; they are free also in most species of Cladonia. ' Forssell 1885. 13—2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Smith, Annie Lorrain. Cambridge, At the University Press