tansy

noun2

1. •
   A herbaceous plant with yellow flowers, of the genus Tanacetum, especially Tanacetum vulgare.

   • The sunny afternoon was there, like another land. By the path grew tansy and little trees. — 1913
2. •
   (no longer used) A dish common in the seventeenth century, made of eggs, sugar, rose water, cream, and the juice of herbs (including tansy), baked with butter in a shallow dish. "Originally flavoured with tansy, but by Pepys's time generally having spinach as its predominant flavouring."