butter and eggs

from The Collaborative International Dictionary of English v.0.48

Toadflax \Toad"flax`\, n. (Bot.)
   An herb ({Linaria vulgaris}) of the Figwort family, having
   narrow leaves and showy orange and yellow flowers; -- called
   also {butter and eggs}, {flaxweed}, and {ramsted}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Butter and eggs \Butter and eggs\, butter-and-eggs
\butter-and-eggs\n.(Bot.),
   a name given to several perennial plants having showy flowers
   of two shades of yellow, or of yellow and orange, such as
   {Narcissus incomparabilis} in Europe, and the toadflax
   ({Linaria vulgaris}) in the United States; the latter is a
   naturalized weed in North America.

   Syn: toadflax, wild snapdragon, devil's flax, Linaria
        vulgaris.
        [1913 Webster + WordNet 1.5]