lastdragon.org

Images of British Lichens

---

Arthonia apotheciorum (A.Massal.) Almq.
 
(= Arthonia clemens auct.)

Lacks a thallus or its own photobiont (and arguably a "lichen" only as a member of a generally lichenised genus), occurs in the hymenium of species of the Lecanora dispersa group, notably Lecanora albescens, taking over and blackening the apothecia. Ascospores 1-septate (compare A. varians). Widespread, probably frequent but sparsely recorded. Refs: Smith et al. (2009), 158; Purvis et al. (1992), 79 (as A. clemens).

 

In apothecia of Lecanora albescens, on coastal limestone, Sand Bay, Somerset, February 2010 (BLS meeting, material lent by John Skinner)

---

Lichens HOME PAGE | Index of Species | Conditions of Use and e-mail contact | References | Site Home Page

© A.J. Silverside
Uploaded March 2011, last modified November 2011