The Knotweed Page!
  A web site devoted to information about Japanese Knotweed and related plant species
The Knotweed Page  |  All About Knotweed  |  Taming The Wild Knotweed  |  Knotweed Literature  |  Plant Native!

Recent field research with Japanese knotweed (Fallopia japonica) and related species

Fallopia japonica along the Monatiquot River in Braintree, MA Japanese Knotweed (Fallopia japonica, Polygonum cuspidatum), an adult female growing along the Monatiquot River in Braintree, Massachusetts.  The brown is last year's growth, still amazingly upright after several winter storms.
Now -this- is 'Giant Knotweed'! A leaf from Fallopia sachalinensis, collected from a population in Hawley, Massachusetts. So big, I couldn't even fit the whole thing in my scanner!

This plant was germinated from a seed taken from a potential hybrid between F. japonica and F. sachalinensis. Its true parentage (as well as the classification of its maternal parent) remains to be determined. Potential F. japonica X F. sachalinensis

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