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Roccella tinctoria

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Title: Roccella tinctoria  
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Subject: Litmus, Blotting paper, Arthoniomycetes, PH indicator, Violet (color)
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Roccella tinctoria

Roccella tinctoria
Scientific classification
Kingdom: Fungi
Division: Ascomycota
Class: Arthoniomycetes
Order: Arthoniales
Family: Roccellaceae
Genus: Roccella
Species: R. tinctoria
Binomial name
Roccella tinctoria

Roccella tinctoria is a species of fungus in the genus Roccella, homotypic synonym of Lecanora tinctoria (DC.) Czerwiak., 1849. It was first described by Augustin Pyramus de Candolle in 1805. It has the following varieties:

  • R. t. var. portentosa
  • R. t. var. subpodicellata
  • R. t. var. tinctoria

and formae:

  • R. t. f. complanata
  • R. t. f. tinctoria


It is used to make litmus, a mixture of several organic compounds.

lichens[1] including R. tinctoria.


  1. ^ Robiquet: „Essai analytique des lichens de l’orseille“, Annales de chimie et de physique, 1829, 42, p. 236–257.

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