No photo unfortunately as I was out running. But I came across a tall (4 foot?) plant which I had figured was a willowherb, and chalky moderately dry ground. Similar structure and appearance to rosebay willowherb and lanceolate leaves. But today it has flowered; a big spray of yellow flowers. Any suggestions as to what this might be? I know I should hold off posting until I can go back to get a photo, but it is bugging me.