|St John's Wort|
The next time I visited I was delighted to see a flush of lovely yellow flowers until I later discovered these are the invasive weed St John's Wort. I tried hard to prove they were a native Hypericum but the black dots on the leaf margins are apparently a dead give away.
I'm told this herb is used as a natural anti-depressent whereas it only depressed me that I had to yank out as many of them as I could while the earth is moist and before they set billions more seeds which apparently last in the soil for up to 20 years. Crikey I might be still pulling these when I am almost 80.