I'm guessing it's the California Poppy picture, which according to USDA "can be weedy or invasive according to the authoritative sources noted below" (the sourc

I'm guessing it's the California Poppy picture, which according to USDA "can be weedy or invasive according to the authoritative sources noted below" (the source being [0]). In fact it is interesting that one of the commenters in other threads claimed to intentionally plan California Poppies wherever they go. They grow wild where I live in Japan, so it clearly is somewhat invasive, but I'm not sure what kind of damage (if any) they do to the environment. I have to admit to being caught out by this myself. My wife and I lived in the UK for a few years and when we came back home to Japan, we collected seed from the garden to remind us of England. It's a stupid thing to do, but very easy. I think being aware of what species are local to you area and collecting those local seeds is probably a good way to stay safe. [0] - http://www.tneppc.org/TNEPPC2004PlantList-8x11.pdf http://www.tneppc.org/TNEPPC2004PlantList-8x11.pdf