Source : Webster's Revised Unabridged Dictionary (1913)

Grindelia \Grin*de"li*a\, n. [NL. Named after D. H. Grindel, a
   Russian.] (Med.)
   The dried stems and leaves of tarweed ({Grindelia}), used as
   a remedy in asthma and bronchitis.

Source : WordNet®

Grindelia
     n : large genus of coarse gummy herbs of western North and
         Central America [syn: {genus Grindelia}]