Umbilicaria freyi spec. nova und der Formenkreis vonUmbilicaria hirsuta in Europa (Lichenes,Umbilicariaceae) |
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| Authors: | M Codogno J Poelt D Puntillo |
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| Institution: | (1) Dipartimento di Biologia, Universitá degli studi di Trieste, I-34127 Trieste, Italien;(2) Institut für Botanik, Karl-Franzens-Universität, Holteigasse 6, A-8010 Graz, Österreich;(3) Orto Botanico, Universitá della Calabria, I-87030 Arcavacata di Rende (CS), Italien |
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| Abstract: | InUmbilicaria hirsuta andU. grisea the so-called soredia originate from structured plectenchyma of the upper thallus layer (thus contrasting with true soredia, which are pushed off from unstructured medullar plectenchyma), and, therefore, are termed parasoredia. Both species have been regarded to comprise (in western Europe) forms with relatively large thalli and a pale lower surface; rhizinomorphs may be present (with varying density) or absent; propagation is not by parasoredia, but by flattened diaspores (schizidia s. l.) These forms are united here and described as a separate species:U. freyi (syn.U. hirsuta var.pyrenaica
Frey andU. grisea resp.murina f.subpapyria
Frey). So far, the species is known to occur from the western Alps through C. France to the Pyrenees, C. Spain and Italy including Sardinia.Herrn Prof. Dr.Lothar Geitler zum 90. Geburtstag gewidmet. |
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| Keywords: | Lichenes Umbilicariaceae Umbilicaria freyi spec nova U hirsuta U grisea Thallus structure soredia parasoredia schizidia taxonomy distribution Lichenflora of Europe |
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