2: Japanese knotweed (Central Park, Mar 19, 2000)

3: Japanese knotweed. Last year's stems. Good for flutes. (Central Park, Mar 19, 2000)

4: Japanese knotweed. Last year's stems. Closeup. (Central Park, Mar 19, 2000)

5: Japanese Knotweed. Last year's stalks. Good for flutes. (Prospect Park, Mar 25, 2000)

6: Japanese Knotweed. New shoots. Now edible, and will be for only a couple more weeks. This is a fast grower. (Prospect Park, Mar 25, 2000)

9: Stand of knotweed stalks from last year (Crestwood Riverside, Apr 14, 2001)

10: Knotweed sprouts. Only good for another week or so. (Crestwood Riverside, Apr 14, 2001)

11: Japanese knotweed. End of season. (Prospect Park, Apr 22, 2001)

13: Japanese knotweed. Out of season. (Inwood Park, Jul 17, 2011)

14: Japanese knotweed. Note stems. (Inwood Park, Jul 17, 2011)

7: Japanese knotweed (Central Park, Nov 19, 2000)

8: Japanese knotweed shoots. Will come up and be edible next spring. (Central Park, Nov 19, 2000)

1: Japanese Knotweed (Central Park, Nov 21, 1999)

12: A stand of Japanese knotweed. (Marine Park, Nov 27, 2005)