Crossword clues for the word: KNAPWEED The word KNAPWEED has appeared as an answer to at least 2 crossword clues on different crossword puzzles. Crossword clues for KNAPWEED Showing 1 to 2 of 2 results Clue(s) Hardy purple-flowered plant Perennial herb of the daisy family with purple flowers such as the wig — or greater —