High Quality Content by WIKIPEDIA articles! Mouse-ear Hawkweed (Pilosella officinarum, syn. Hieracium pilosella L.) is a yellow-flowered species of Asteraceae, native to Europe and northern Asia. It produces single, citrus-colored inflorescences. It is an allelopathic plant. Like most hawkweed species, it shows tremendous variation and is a complex of several dozens subspecies and hundreds of varieties and forms.

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