Southern Marsh Orchids
Wednesday, 18 December 2013
During an amble around Llandaff Cathedral yesterday a total of 29 species of bryophyte were noted on the walls, masonry and between the cobbles. The list included two noteworthy calcicoles, Curving Feather-moss Scorpiurium circinatum and Shady Beard-moss Didymodon umbrosus, both in the more humid habitats around the base of the cathedral walls. Unfortunately I never took any photos in situ, but for the record below is a pic of Shady Beard-moss taken under the microscope.
Perhaps the most prominent species was Common Liverwort Marchantia polymorpha subsp. ruderalis, which was abundant between the cobbles at the base of the building along with other species of general interest such as Rigid Beard-moss Didymodon rigidulus, Spiral Extinguisher-moss Encalypta streptocarpa and Wavy Beard-moss Didymodon sinuosus. A more methodical search would certainly produce a longer list and maybe a few more surprises.