appearance bloom blooming blooms colored coloring colors coloured colouring colours contrast contrasting decorative delicate display distinctive exotic flora flower flowers foliage green greenery growth hardy herbaceous leaves light ornamental perennial plants purple sub-tropical surface surfaces temperate texture textures variations variety vegetation annual arctotheca calendula cape daisy cape dandelion cape gold cape marigold cape weed competitive daisylike edible groundcover hairy stems herb invasive-weed lobed basal leaves noxious-weed petals plant prolific rosettes spreader squat perennial stolons taproot vigorous weed yellow appearances arid Cacti cactus clumps clusters edge edges garden garden-display garden-plants irregular perennials pointed protection shape shapes sharp short-spikes small-spines spikes spines spiny succulents unusual