I am looking for information about Japanese Knotweed (Polygonum cuspidatum) regarding silica uptake. If anyone knows if this plant does-or does not take up silica please let me know. I would also be grateful for general info about P. cuspidatum as well. Annika Johansson 208 NCL, Lamont Doherty Earth Observatory Palisades, New York, 10968 914-365 8622