[1] : The Collaborative International Dictionary of English v.0.48

jimson weed \jim"son weed`\
   see jamestown weed. local, u.s. jin
see also:
jamestown weed 

[2] : WordNet (r) 2.0

jimson weed
     n : intensely poisonous tall coarse annual tropical weed having
         rank-smelling foliage, large white or violet
         trumpet-shaped flowers and prickly fruits syn: jimsonweed,
          jamestown weed, common thorn apple, apple of peru,
          datura stramonium
see also:
jimsonweed jamestown weed common thorn apple apple of peru datura stramonium 

Jimson Weed >> J Words
Jimson Weed, definition of term: Jimson Weed
jimson+weed_pag1.html

Joe-Pye Weed >> J Words
Joe-Pye Weed, definition of term: Joe-Pye Weed
joe-pye+weed_pag1.html

Dill Weed >> D Words
Dill Weed, definition of term: Dill Weed
dill+weed_pag1.html