Rosebay willow herb (chamerion angustifolium) is pretty impressive, I think. You can be walking along anywhere within the treeline, turn a corner on your wanderings and suddenly it’s there. These are opportunists that add a splash of pink and green to a demolition site, wasteground or by a woodland charcoal kiln as seen here in The Outwoods in Leicestershire. It’s good to have them!
Rosebay Willow Herb