A study of the lichens in two cemeteries

Observation - A study of the lichens in two cemeteries . Description: A study of abundance of the lichens in two cemeteries. The lichens seen at each of the two cemeteries on different aged gravestones. On the 5th gravestone (likely from year 1901) there was abundant grey foliose lichen. Possibly

A study of abundance of the lichens in two cemeteries. The lichens seen at each of the two cemeteries on different aged gravestones. On the 5th gravestone (likely from year 1901) there was abundant grey foliose lichen. Possibly