Compositrema borinquense

Species of lichen

Compositrema borinquense is a species of corticolous (bark-dwelling) crustose lichen in the family Graphidaceae. It is found in northeastern Puerto Rico, where it grows on the trunks of trees in the palo Colorado forest of El Yunque National Forest. This lichen differs from others in the genus Compositrema, most notably from its closest relative, C. thailandicum, due to its distinctive, irregularly radiating columella–a central shaft of fungal hyphae in the ascoma.

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