All bow to our alien overlords !!

[Prepper1]

http://en.wikipedia.org/wiki/Japanese_knotweed

Japanese knotweed.....

The young stems are edible as a spring vegetable, with a flavor similar to extremely sour rhubarb. In some locations, semi-cultivating Japanese knotweed for food has been used as a means of controlling knotweed populations that invade sensitive wetland areas and drive out the native vegetation.[12] Use in Japan as sansai or wild foraged vegetable is discussed below

The plant is known as itadori (イタドリ, 虎杖?). The kanji expression is from the Chinese meaning "tiger staff", but as to the Japanese appellation, one straightforward interpretation is that it comes from "remove pain" (alluding to its painkilling use)

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How to eat japanese knotweed....

http://www.tacticalintelligence.net/blog...otweed.htm