Buterweed or Butterweed: How To spell?
The word Buterweed is misspelled against Butterweed, a noun meaning "An annual composite plant of the Mississippi valley (Senecio lobatus)."
Butterweed has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings bu & erweed which should not be misspelled with single 'T'
Wrong Spelling:  bu-t-erweed  Correct Spelling:  bu-tt-erweed 
Check more misspelled words of Butterweed to spell it correct.