What is "hieracium pilosella"

Mouse-ear \Mouse"-ear`\, n. (Bot.)

1. The forget-me-not ( Myosotis palustris) and other species of the same genus.

2. A European species of hawkweed ( Hieracium Pilosella).

   Mouse-ear chickweed, a name of two common species of chickweed ( Cerastium vulgarium, and Cerastium viscosum).

   Mouse-ear cress, a low cruciferous herb ( Sisymbrium Thaliana). All these are low herbs with soft, oval, or obovate leaves, whence the name.

Hieracium pilosella ( syn. Pilosella officinarum), known as mouse-ear hawkweed, is a yellow-flowered species of flowering plant in the daisy family Asteraceae, native to Europe and northern Asia. It produces single, lemon-coloured inflorescences. It is an allelopathic plant. Like most hawkweed species, it is highly variable and is a member of a species complex of several dozens of subspecies and hundreds of varieties and forms.