archil

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Close-up of orchil lichen (Roccella tinctoria) growing on a rock surface, showing its tangled, shrub-like structure.

archil: Media

dye

Images

Close-up of orchil lichen (Roccella tinctoria) growing on a rock surface, showing its tangled, shrub-like structure.

Archil lichen (Roccella tinctoria)

This species of lichen is the source of the acid-base indicator dye litmus.

© Zoltan Bartalis

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