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The Collaborative International Dictionary
Astrantia major

Masterwort \Mas"ter*wort`\, n. (Bot.)

  1. A tall and coarse European umbelliferous plant ( Peucedanum Ostruthium, formerly Imperatoria).

  2. The Astrantia major, a European umbelliferous plant with a showy colored involucre.

  3. Improperly, the cow parsnip ( Heracleum lanatum).

Wikipedia
Astrantia major

Astrantia major, common name great masterwort, is a species of flowering plant in the family Apiaceae, native to central and eastern Europe. Growing to tall by broad, it is an herbaceous perennial, much used in gardens.