fairy ring n. a naturally occurring ground circle caused by fungi or other biological agents; figuratively, a fanciful ring or circle of mystical or unusual behavior or action. (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
Some research suggests that photos of animals tend to capture the attention of humans more readily than photos of plants. Botanists even have a term for “the inability to see or notice the plants in one’s own environment.” They call it plant...