Source : Webster's Revised Unabridged Dictionary (1913)

Pinesap \Pine"sap`\, n. (Bot.)
   A reddish fleshy herb of the genus {Monotropa} ({M.
   hypopitys}), formerly thought to be parasitic on the roots of
   pine trees, but more probably saprophytic.

Source : WordNet®

pinesap
     n : fleshy tawny or reddish saprophytic herb resembling the
         Indian pipe and growing in woodland humus of eastern
         North America; in some classifications placed in a
         separate genus Hypopitys [syn: {false beachdrops}, {Monotropa
         hypopithys}]