Rinodina colobina is a species of corticolous (bark-dwelling) crustose lichen in the family Physciaceae. It has a dark grey, granular appearance and typically grows on nutrient-rich bark of deciduous trees, including elm, maple, and oak. The lichen is characterised by small black reproductive structures (apothecia) surrounded by a grey margin. It is widely distributed across Europe and North America, favouring areas with consistently high humidity levels.

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