black brightly coloured carpeting plants clump-forming clumps colors colours common daisy-like drought-tolerant environmental weed flower flowers garden escape garden flowers gazania gazanias golden hardy introduced species invasive lance-shaped leaves low-growing orange perennial plants prolific rapid spreader resilient roadside weeds South African streaked tough vivid water-wise weed widespread wind-blown seeds yellow euphorbia Greece Greek landscape mountain natural nature old olive spring spurge stone trees wall wild dappled drops fresh garden green leaf leaves light plant raindrops reflections rosa rose shade summer water Alchemilla bokeh close up cloud clouds cose drop leafs macro margerit Nyberg pental rain reflection sky Cymbalaria muralis England english Great Britain historical ivy-leaved toadflax Sussex blue crop field focus HDR holiday oil rape rural seed sun white Asteraceae ball clock Dandelion fly herb officinale pappus parachute pattern snow sphere Taraxacum texture