appearance black brightly-coloured carpeting-plants clump-forming clumps color coloration colored colorful colors colour coloured colourful colours common daisy-like drought-tolerant environmental-weed flower flowers garden flowers garden-escape 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 city garden dusk evening nature. roses summer garden sunset architecture brick classical columns red background BART ceramic hexagon honeycomb San Francisco subway surface texture tile tiles Underground urban wall botanic garden botanics carnivorous catch danger devour digests Dionaea muscipula eating flies fly Flytrap glasgow green grip insect insect eating nutrition plant savage trap Venus