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Poelt, J 1970: Das Konzept der Artenpaare bei den Flechten. - Vortrage aus dem Gesamtgebiet der Botanik, N.F. [Deutsch. Bot. Ges.] 4: 187-198. [RLL List # 75 / Rec.# 14841]
Keywords: SPECIES PAIRS/ ARTENPAARE/ PARALLEL EVOLUTION/ PRIMARY SPECIES/ SECONDARY SPECIES/ SOREDIA/ ISIDIA/ ASEXUAL REPRODUCTION
Abstract: 3 fig. 1 tab. [A detailed discussion of species pairs in lichens in which one member ("Primarart") commonly produces apothecia but no asexual propagules and the other member ("Secondarart") produces either soredia or isidia and is usually sterile. The distributions of such species pairs are discussed and a list of "secondary" species for which no "primary" counterparts are as yet known is given.]

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