The Collaborative International Dictionary of English v.0.48:

Pinesap \Pine"sap`\, n. (Bot.)
   A reddish fleshy herb of the genus Monotropa (Monotropa
   hypopitys), formerly thought to be parasitic on the roots of
   pine trees, but more probably saprophytic.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pinesap
    n 1: 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: pinesap, false beachdrops, Monotropa
         hypopithys]