Belongs within: Lecanorales. Itch lichens Published 11 May 2018 Just a very quick one today. The photo above is of a member of the Psoraceae, a group of lichens sometimes referred to as ‘fishscale lichens’. As their vernacular name indicates, Psoraceae are characterised by a scaly appearance, together with a preference for growing on soil… Continue reading Psoraceae


Belongs within: Lecanoromycetes.Contains: Umbilicaria section Glabrae, Umbilicaria section Polymorphae, Umbilicaria secton Velleae. Umbilicaria, rock tripe, is a cosmopolitan genus of saxicolous lichens that derive their name from their attachment to the substrate by a distinct ‘navel’. Gyrophoropsis is a subgenus of the lichen genus Umbilicaria containing species with relatively large spores. Characters (from Frey 1933):… Continue reading Umbilicaria


Belongs within: Parmeliaceae. Parmelia is a cosmopolitan genus of foliose lichens, light-coloured above and black below with the lower surface anchored to the substrate by rhizenes, and often with squarish ends to the thallus lobes. Learning to like lichen Published 9 December 2010 We all know what lichens are. They’re the standard example of a… Continue reading Parmelia


Belongs within: Ostropales.Contains: Porina. The Trichotheliales is an order of lichenised fungi associated with trentepohlioid algae. Characters (from McCarthy 2001): Trentepohlioid photobiont; perithecioid ascomata; largely unbranched hamathecium of paraphyses; thin-wwalled unitunicate asci. Trichotheliales | i. s.: Ascolacicola Ranghoo & Hyde 1998JC03, E99 | |–*A. aquatica Ranghoo & Hyde 1998 [anam. Trichocladium uniseptatum]E99 | `–A. austriacaJC03… Continue reading Trichotheliales


Belongs within: Trichotheliales. Porina is a genus of lichenised fungi found primarily in shaded habitats in tropical and subtropical regions (P. M. McCarthy). Characters (from P. M. McCarthy): Thallus corticolous, saxicolous or foliicolous (rarely bryophilous or terricolous). Algae Trentepohlia (mainly in corticolous and saxicolous spp.) or Phycopeltis (in most foliicolous spp.). Perithecia immersed in the… Continue reading Porina

Umbilicaria section Glabrae

Belongs within: Umbilicaria. The section Glabrae of the lichen genus Umbilicaria is characterised by a lobed or sinuate-edged thallus that lacks rhizines (Frey 1933). Characters (from Frey 1933): Underside of thallus without rhizines. Thallus usually brown or greenish gray or brown-black above, black or reddish-gray or whitish below, edge usually somewhat roundly lobed or sinuate.… Continue reading Umbilicaria section Glabrae

Umbilicaria section Polymorphae

Belongs within: Umbilicaria. The section Polymorphae in the lichen genus Umbilicaria is characterised by a more or less distinctly reticulate thallus. Characters (from Frey 1933): Upper side of thallus more or less distinctly reticulately ribbed, with ridges or bulges at least present in the middle clearly over the umbilicus, and with at least some rhizines… Continue reading Umbilicaria section Polymorphae

Umbilicaria section Velleae

Belongs within: Umbilicaria. The section Velleae in the genus Umbilicaria is a group of lichens with a more or less smooth surface. Characters (from Frey 1933): Upper side of thallus smooth or finely cracked, never with net-like ribs or wavy ridges. Underside of thallus with rhizines or, failing this, having a cracked and warty areolar… Continue reading Umbilicaria section Velleae


Belongs within: Ostropomycetidae. The Baeomycetaceae are a family of lichens containing green algae, found growing on soil, rocks or similar substrates (Cannon & Kirk 2007). Characters (from Cannon & Kirk 2007): Thallus varied, usually crustose or squamulose. Ascomata sessile or shortly stipitate, sometimes clustered, formed on specialised generally non-lichenised thalline branches, flat or convex, pink… Continue reading Baeomycetaceae


Belongs within: Lecanorales. The Ectolechiaceae are a mostly tropical family of lichens containing green algae. Characters (from Cannon & Kirk 2007): Thallus usually foliose or crustose. Ascomata apothecial, pale, convex, without a well-developed margin. Interascal tissue of very narrow anastomosing pseudoparaphysis-like hyphae, variously pigmented, the apices thin-walled. Asci with a J+ apical cap and a… Continue reading Ectolechiaceae