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A new species of Placocarpus (Verrucariaceae) from southern California

Published online by Cambridge University Press:  23 September 2009

Kerry KNUDSEN ,
Othmar BREUSS  and
Jana KOCOURKOVÁ
Kerry KNUDSEN
Affiliation:
Department of Botany and Plant Sciences, University of California, Riverside, CA 92521-0124, USA. Email: kk999@msn.com
Othmar BREUSS
Affiliation:
Naturhistorisches Museum, Botanische Abteilung, Burgring 7, A-1010 Wien, Austria.
Jana KOCOURKOVÁ
Affiliation:
Department of Mycology, National Museum, Václavské nám. 68, 115 79 Praha 1, Czech Republic.
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Abstract

A new species, Placocarpus americanus, is described from the Santa Monica Mountains in Southern California. It is a juvenile parasite on Protoparmeliopsis muralis and differs from Placocarpus schaereri in having smaller non-halonate ascospores, a negative iodine reaction of the medulla, lack of inspersion of the medulla with small crystals, and having a thallus of dispersed areoles.

Keywords

lichenicolous lichensProtoparmeliopsis muralispyrenocarpous lichensVerrucula
Type
Research Article
Information
The Lichenologist , Volume 41 , Issue 6 , November 2009 , pp. 627 - 630
Copyright
Copyright © British Lichen Society 2009

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