Mallow is very common on farms and vacant blocks. Not overly ugly en masse at least. I think there might be a huge variety of thistle forms. You get the gamut

Mallow is very common on farms and vacant blocks. Not overly ugly en masse at least. I think there might be a huge variety of thistle forms. You get the gamut from small and smooth up to the thicker, spikier ones as far as Scotch Thistles, plus low, flat ones that escape the mower like stemless thistle - https://www.google.com/search?q=stemless+thistle&tbm=isch https://www.google.com/search?q=stemless+thistle&tbm=isch In a backyard garden sense, I can cope with thistles, but things that infest soil like soursobs, mint, dichondra can get annoying. Watsonia, ivy and couch grass also give me grief.