1911 Encyclopædia Britannica/Witch Brooms
|←Witch and Wizard|| 1911 Encyclopædia Britannica, Volume 28
|See also Witch Brooms on Wikipedia, and our 1911 Encyclopædia Britannica disclaimer.|
WITCH BROOMS, or "Birds' Nests," in botany, peculiar broom-like growths often seen on the branches of many trees. They are a dense development of branching twigs formed at one place on a branch as the result of the irritation set up by the presence of a mite or a fungus.