The Collaborative International Dictionary of English v.0.48:

hediondilla \hediondilla\ n.
   A desert shrub (Larrea tridentata) of the Southwestern U.S.
   and Northern Mexico having persistent resinous aromatic
   foliage and small yellow flowers.

   Syn: creosote bush, coville, Larrea tridentata.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Larrea tridentata
    n 1: desert shrub of southwestern United States and New Mexico
         having persistent resinous aromatic foliage and small
         yellow flowers [syn: creosote bush, coville,
         hediondilla, Larrea tridentata]