crowflower

From crow +‎ flower?

crowflower (plural crowflowers)

1. (obsolete) A kind of campion.
   • c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene vii]:

     There with fantastic garlands did she come / Of crowflowers, nettles, daisies, and long purples.