Knapwed or Knapweed: How To spell?
The word Knapwed is misspelled against Knapweed, a noun meaning "The black centaury (Centaurea nigra); -- so called from the knoblike heads of flowers. Called also bullweed."
Knapweed has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Knapw & d which should not be misspelled with single 'E'
Wrong Spelling:  Knapw-e-d  Correct Spelling:  Knapw-ee-d 
Explore spell check of Knapweed to spell without errors.