Pertusaria aspergilla (Lepra aspergilla)
Lichen on a headstone
Pertusaria aspergilla (Lepra aspergilla). A pale grey crustose lichen on a grave headstone. A common lichen found on nutrient rich sandstone. Examples here are from a headstone dated 1884 in Redmire churchyard, facing west. Another lichen, the muddy brown Acarospora fuscata, occupies the same stone in roughly equal coverage.
Photograph detail
Slide 1: Two lichens, Pertusaria aspergilla with Acarospora fuscata on sandstone headstone, west facing. Churchyard. Redmire. May.
Slide 2: Pertusaria aspergilla, on sandstone headstone, west facing. Churchyard. Redmire. May.
Slide 3: Pertusaria aspergilla. Detail of thallus. Collected from the churchyard. Redmire. May.
Slide 4: Pertusaria aspergilla (top), showing thin prothallus meeting Acarospora fuscata.