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. 2012 Nov 8;3:390. doi: 10.3389/fmicb.2012.00390

Figure 1.

Figure 1

When do we call it lichen? (A) Lichen-like association of Cladosporium-like fungus (according to ITS sequences) with aerial algal cells, on polypropylene surface, Botanical Garden Graz, 2011. Arrows indicate coccal algal cells (a) attached to fungal hypha (f); Bar = 20 μm. (B) Habit of the “black” lichen Cystocoleus ebeneus; a closed sheath of black fungal hyphae (f) wrap a central algal thread (a); Bar = 10 μm.