Field mouse-ear is a common plant species found in many parts of the world, particularly in North America and Europe. This herbaceous plant is known for its distinctive leaves that resemble the ears of a mouse. While field mouse-ear is a common name for this plant, there are several other synonyms for it that you may come across. Some of these include Tordylium apulum, Tordylium maximum, and Tordylium officinale. Other common names for this plant include umbrella bird's-nest, hartwort, and Mediterranean hartwort. These synonyms are often used interchangeably, but they all refer to the same plant species with its unique mouse-ear shaped leaves.