abundant angles appearances castor-beans castor-oil castor-oil-plant castor-seeds cluster clusters common cotyledons Euphorbiaceae fast-growing flower flowers foliage highly-toxic inflorescences invasive large large-leaves leaf leaves medicinal palm-of-Christ palma-Christi poison poisonous ricinus-communis seed-pods seedhead shrub shrubbery spiky-green-seed-capsule spiny surface surfaces textured textures toxic toxins vegetation wasteland-weed weed widespread appearance aquatic-bird Australian Australian-shelduck bird chestnut-breasted-shelduck chestnut-coloured-shelduck color coloring colour colouring dark duck fairly-large farm-bird fowl goose-like-birds mountain-duck paddle paddling park pied-waterfowl pond poultry public reflecting reflection ripples rippling swimming tadorna-tadornoides urban water water-bird water-fowl white white-eye-circle (female) white-neck-collars wild wild-duck wildlife brightly-coloured carpeting-plants clump-forming clumps coloration colored colorful colors coloured colourful colours daisy-like drought-tolerant environmental-weed garden flowers garden-escape gazania gazanias golden hardy introduced-species lance-shaped-leaves low-growing orange perennial plants prolific rapid-spreader resilient roadside-weeds South-African streaked tough vivid water-wise wind-blown-seeds yellow black