Arthonia epip4586f.jpg

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Arthonia epiphyscia, hymenium mounted in Lugol's iodine after pre-treatment with K. A faint ring structure is sometimes visible in the apical dome of the asci.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith