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 abstract appearance background blue-crown-passionflower blue-passion-flower caerulea climber close-up colorful coloring colors colourful colouring colours common-passionflower cultivar cut edible evergreen flora food fruit garden-flower green greenery hardy hardy-passionflower open ornamental ornamental-passionfruit Passiflora passiflora-caerulea passion-fruit passionfruit pith radial seeds skin strange tasty tendrils tropical-twining-vine unusual vigorous vine arid Australia Australian blood-red clianthus-formosus color coloration colored colour coloured contrast creeper creeping-plant creeping-vine crimson emblem emblematic fabaceae floral floral-emblem glossy ground-cover light native pea-family perennial petals scarlet shade slow-growing South-Australian-emblem Sturt's-desert-pea sunlight sunshine swainsona-formosa wildflower willdampia-formosa ‘flower-of-blood'