A revision of the lichen genus Paraparmelia Elix & J. Johnst.

The lichen genus Paraparmelia Elix 8: J. Johnst. (Parmeliaceae) is revised. A key and descriptions for the 83 species are given, and the synonymy, chemistry, distribution, ecology and taxonomic affinities of each species are discussed. Nine new species are described: Paraparmelia crawfordensis, P. gemmulifera, P. fynbosiana, P. juxtata, P. oveana, P. tzaneenensis, P. valdeta, P. wirthii and P. xerica. In addition, the following new combinations are made: Canoparmelia alabamensis (Hale &: McCull.) Elix, C. rupicola (Lynge) Elix, Paraparmelia barda (Brusse) Elix, P. pristiloba (Brusse) Elix and Xanthoparmelia lecanoracea (Müll. Arg.) Elix.