Notes on the circumscription of the lichens Lecanora leprosa and L. sulphurescens (Lecanoraceae, lichenised Ascomycotina)

H. Thorsten Lumbsch; John A. Elix

doi:10.11646/bde.7.1.7

Issue: Vol. 7 No. 1: (1993)

Type: Article

Published: 1993-12-01

DOI: 10.11646/bde.7.1.7

Page range: 71–75

Abstract views: 85

PDF downloaded: 0

**Notes on the circumscription of the lichens Lecanora leprosa and L. sulphurescens (Lecanoraceae, lichenised Ascomycotina)**

H. Thorsten Lumbsch⁺⁻
John A. Elix⁺⁻

Universität Essen, Fachbereich 9/Botanik, Postfach 103 764, D-4300 Essen 1, Germany

Chemistry Department, Australian National University, Canberra, ACT 0200, Australia

Bryophyta Lecanora leprosa L. sulphurescens

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Abstract

Lecanora leprosa and L. sulphurescens are two commonly misidentified pantropical lichens. A detailed circumscription is presented to help overcome such difficulties. Both species contain a chemosyndrome of chlorodepsidones based on gangaleoidin. The new depsidone chlorolecideoidin (methyl 2,4,9-trichloro-3,8-dihydroxy-1,6-dimethyl-11-oxo-11H-dibenzo[b,e][1,4]-dioxepin- 7-carboxylate) has been shown to be a minor component of both species.

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