Knautia drymeia, commonly known as the Hungarian widow flower,[2] is a herbaceous perennial plant species in the family Caprifoliaceae,[3] that grows in Central and Southeastern Europe.

[3] Its oppositely arranged simple and entire leaves are in most cases petiolate, covered with trichomes and lanceolate to ovate in shape.

drymeia (white to gray), but its stem leaves are round to widely ovate and deeply serrated.

[3] Its flowers are united into so-called calathidium inflorescences, that are surrounded by lanceolate involucral leaves.

The plant's sepals are reduced into very short and pointy flower bristles, that are usually in groups of 8.