A friend just brought over a piece of what is obviously a hypericum. With some research we have identified it as H. androsaemum (tutsan). It has appeared in a couple of locations and is quite cute but we also see it is listed as invasive. This is a suburban garden west facing Camano island. Can she leave it or should she eradicate sooner rather than later.
Since, as you are indicating yourself (I guess) this is starting to appear wild in this area it probably should no longer be deliberately cultivated. The multiple plants I once encountered well inside a forested park made me think it had potential to be an ecosystem invader here. It is one thing for something to be a garden or roadside weed, where there is a lot of human-caused disruption of the native vegetation. It is quite another for it to pop up in more or less deep woods, otherwise consisting of native plants, and start forming a colony there - although it is true the one site was where there had been a slide or slippage that exposed mineral soil, and that is where the tutsan was. But then there is butterfly bush and its choking of local river banks, where sand and gravel have been left exposed by the water...
