Green alga
North side of gatepost
Terrestrial green algae are able to survive in damp, shady places, such as this sandstone gatepost, probably of 19th century origin.
Photograph detail
Slide 1: Green alga (unidentified) growing on a damp north facing sandstone gatepost in Redmire village.January.
Slide 2: Detail of sandstone gatepost, Redmire village, with green alga. January.
Slide 3: Close view of sandstone surface showing silicate structure of stone and green alga (unidentified). January.
Slide 4: Algal cells collected from gatepost. Photographed at x1000, oil immersion and phase contrast. January.