How many kinds of flowers grow in an English city garden? I'll tell you now of some I know, and those I miss, you can look up yourself...

Fat-hen, Hairy bitter-cress, Many-seeded Goosefoot, Narrow-fruited Cornsalad, Nipplewort, Petty Spurge, Shepherd's Purse, Small Toadflax, Stinking Chamomile, Swine Cress, Three-nerved Sandwort, Sheep's-bit, Viper's-bugloss, Wild Mignonette, Autumn Lady's-tresses, Lords-and-Ladies, Black Horehound, Selfheal, Skullcap, Sneezewort, Bladder-sedge, Bog Stitchwort, Fen Bedstraw, Hard Rush, Dodder, Greater Dodder, Black Bent, Common Bent, Creeping Bent, Bog Pimpernel, Common Broomrape, Common Couch, Dog's Mercury, Jointed Rush, Common Club Rush, Mugwort, Pendulous Sedge, Procumbent Pearlwort, Sheep's Fescue, Trailing Tormentil, Rigid Hornwort.

These are just some of the varieties of flora found in the NW2 postode area. Link via Fraser.