The Collaborative International Dictionary of English v.0.48:

Eschscholtzia \Esch*scholtz"i*a\, n. [NL. Named after Dr.
   Eschscholtz, a German botanist.] (Bot.)
   A genus of papaveraceous plants, found in California and upon
   the west coast of North America, some species of which
   produce beautiful yellow, orange, rose-colored, or white
   flowers; the California poppy.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Eschscholtzia
    n 1: showy herbs of western North America [syn: Eschscholtzia,
         genus Eschscholtzia]