Moss Identification Argument Enters Third Calendar Year

A dispute between two members of the Hertfordshire Bryological Society over the identification of a moss specimen collected from a churchyard wall in September 2023 has now entered its third calendar year, with neither party showing any indication of concession. The disagreement centers on whether the specimen is Tortula muralis or Grimmia pulvinata, two visually similar cushion-forming mosses that differ in several microscopic characteristics. Dr. Alan Capsule maintains it is Tortula based on the nerve excurrence, while Dr. Brenda Spore insists the peristome teeth are 'unmistakably Grimmia.' 'I have examined this specimen under four different microscopes at three different magnifications,' said Dr. Capsule. 'The leaf apex alone should settle this. It is Tortula. I will die on this wall, just as the moss grew on it.' Dr. Spore has responded by submitting seventeen separate specimens from the same wall to the Natural History Museum for independent verification. The museum's bryology department has issued a statement reading: 'We have received Dr. Spore's specimens and respectfully request that no further submissions be made at this time.' The dispute has effectively paralyzed the society's annual journal, as both parties sit on the editorial board and have refused to approve any content until the other 'acknowledges the obvious.' Fellow society member Patricia Thallus has proposed resolving the matter by DNA analysis. Both disputants rejected this, with Dr. Capsule describing molecular taxonomy as 'the refuge of those who cannot use a hand lens' and Dr. Spore calling it 'admitting defeat by algorithm.' The specimen itself has reportedly dried out beyond reliable identification. Neither party considers this relevant.