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Brodo, I. M./ J. C. Lendemer 2012: On the perplexing variability of reproductive modes in the genus Ochrolechia: Notes on O. africana and O. arborea in eastern North America. - Opuscula Philolichenum 11: 120-134. [RLL List # 227 / Rec.# 33843]
Keywords: Ochrolechia mexicana/ sterile crusts/ hiascic acids
Abstract: Notes on the discovery of several rare, reproductively atypical populations of Ochrolechia africana and O. arborea in eastern North America are presented. Sorediate fertile populations of the typically esorediate and fertile species O. africana were found in the Coastal Plain of southeastern North America. Conversely fertile sorediate populations of O. arborea, a species that is typically sterile and sorediate, were found in Maine and Pennsylvania, U.S.A. The unusual populations are described in detail and their geographic distributions mapped within the context of the reproductively typical populations of each species. A discussion of the labile nature of reproductive modes in Ochrolechia species is presented. The positive hypochlorite reaction in the amphithecial medulla and presence of 4,5-di-O-methylhiascic acid in the apothecia, together with the presence of lichexanthone in all tissues, point to a close relationship of O. arborea with O. mexicana.
URL: http://sweetgum.nybg.org/webmedia.php?irn=722466
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