We started above the Sewage Works' Outfall and worked our way downstream along the Thames Path to just beyond the Waste Incinerator.
Lichen species seen and identified:
Caloplaca citrina agg.
Caloplaca decipiens (lots of it)
Caloplaca saxicola
Candelariella aurella
Lecanora albescens (assumed)
Lecanora campestris
Lecanora dispersa sp.
Lecanora muralis
Phaeophyscia orbicularis
Physcia caesia (lots of it and some with apothecia)
Verrucaria sp. (possibly V. ochrostoma)
Xanthoria calcicola
and Xanthoria parietina
Plus Aspicilia contorta sp. on the Path itself.
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