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Abundant goosefoot, some knotweed (both erect knotweed and other species), some wild rice, and seeds of various grasses and weeds were also recovered.
Barberry, knotweed , and ailanthus are just some of the horticultural immigrants that continue to out-compete many of our indigenous species.
Another plant that has done well in our garden this year is a knotweed , labelled Persicaria filiformes ‘Variegata’.
Dock-leaved knotweed appeared in 1998, and overwhelmingly dominated the submergent littoral zone in 1999.
A knotweed is so called because its roots are knotted or twisted; bistort means twice twisted.
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