Mouse-ear hawkweed

Mouse-ear hawkweed (lat. Pilosella officinarum) is a perennial herbaceous plant belonging to the Asteraceae family. In agriculture, it is recognized primarily as a medicinal plant and a potential component of natural pastures. It is known for its high adaptability and ability to colonize nutrient-poor soils that other crops find difficult to inhabit.

The plant originates from Eurasia and is distributed throughout Europe, Western Siberia, and parts of North Africa. It flourishes in temperate climates, showing a marked preference for sunny, well-drained locations such as pastures, dry grasslands, and rocky slopes. It has also naturalized in many other regions worldwide, often categorized as a hardy perennial.

Botanically, it is distinguished by a rosette of basal leaves covered in dense, silvery-white hairs, which provide a distinct velvet-like texture. The flower stalks produce solitary, bright yellow flower heads that open in response to sunlight. The plant reproduces via seeds and aggressive surface runners (stolons), forming dense mats that can effectively cover the ground surface.

Regarding cultivation requirements, the plant thrives in acidic to neutral, sandy, or gravelly soils with low fertility. It is exceptionally drought-tolerant but suffers significantly in waterlogged or overly shaded conditions. Agronomic management involves maintaining high light availability and preventing excessive competition from taller vegetation, which can easily suppress its growth.

The main areas of economic use are the pharmaceutical industry and traditional medicine, where its diuretic and astringent properties are utilized. Additionally, it serves as a valuable nectar source for bees during the early summer months. Pests and diseases are generally minor concerns, though in humid climates, powdery mildew may occasionally impact the foliage density and overall vigor of the stands.