1. 
[syn: rabbitweed, rabbit-weed, snakeweed, broom snakeweed, broom snakeroot, turpentine weed, Gutierrezia sarothrae]
The Collaborative International Dictionary of English v.0.48:
Snakeweed \Snake"weed`\, n. (Bot.)
   (a) A kind of knotweed (Polygonum Bistorta).
   (b) The Virginia snakeroot. See Snakeroot.
       [1913 Webster]
WordNet (r) 3.0 (2006):
snakeweed
    n 1: low-growing sticky subshrub of southwestern United States
         having narrow linear leaves on many slender branches and
         hundreds of tiny yellow flower heads [syn: rabbitweed,
         rabbit-weed, snakeweed, broom snakeweed, broom
         snakeroot, turpentine weed, Gutierrezia sarothrae]