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 Asia Bamboo Groove bunch bush bushy clump clutch evergreen grass green India Mangalore monsoon ornamental shoot shrub tall timber tree trunk bamboo bambusa vulgaris culms green stripes low light tolerant painted bamboo striped vertical vertical stripes vittata woody grass yellow culms Armeria bare barren chalk cliff coast coastal endurance endure England exposed extreme face harsh nature pink plant summer Sussex thrift wild