Stock Photo - Foliose lichen cross section showing from up to down: cortex, Algae, hyphae (fungus filaments), and cortex. Photomicrograph X200 at 10 cm wide.

Stock Photo: Foliose lichen cross section showing from up to down: cortex, Algae, hyphae (fungus filaments), and cortex. Photomicrograph X200 at 10 cm wide.

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