When it comes to keeping your garden looking lovely, how well do you know your weeds from your plants?Most of us are familiar with the common weeds that can cause problems in our gardens, and can probably identify culprits such as dandelions, daisies, nettles, creeping buttercup and bindweed. But there's a whole host of wild plants that could easily be tricking you into thinking they're actually cultivated varieties.So how do you work ...