Lepra amara var. flotowiana (Flörke)

Provisionally placed here, ICN Art. 36.1b.. Basionym: Pertusaria ocellata var. flotowiana Flörke in Körb. - Syst. Lich. Germ.: 383, 1855.
Synonyms: Lepra amara (Ach.) Hafellner; Pertusaria amara var. flotowiana (Flörke) Erichsen
Distribution: N - VA (Matteucci & al. 2015d), Emil (Benesperi 2009, Fariselli & al. 2020). C - Tosc (Craighero 2010), Marc (Nimis & Tretiach 1999), Abr (Nimis & Tretiach 1999), Sar (Craighero 2010). S - Cal (TSB 4686), Si (Nimis & al. 1996b, Ottonello & Romano 1997).
Description: Thallus crustose, episubstratic, continuous to fissured, whitish, pale grey or greenish grey, often weakly zoned at margin, delimited by a white prothallus, tasting extremely bitter. Central parts of thallus with numerous, circular, 0.5-2 mm wide, white, strongly convex to hemispherical soralia. Apothecia not known. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; soralia and medulla K-, C- KC+ fleeting violet, P- or P+ reddish, UV-. Chemistry: picrolichenic acid, sometimes with additional protocetraric and conprotocetraric acids.
Note: on siliceous rocks. A very critical taxon, which badly needs revision, perhaps just a saxicolous form of L. amara.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: rare
Submediterranean belt: very rare
Padanian area: absent
Humid submediterranean belt: rather rare
Humid mediterranean belt: rare
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

P.L. Nimis CC BY-SA 4.0

TSB 19386

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (19386)