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 annuals bell-peppers blocky bulky capsaicin capsicum capsicum-annuum chili-peppers color colorful colour colourful decorative flesh fleshy food fruit glossy green healthy juicy mild moist moisture natural-foods nightshade-family orange peppers perennials pungency red salad-food seeds shiny smooth-skinned snack-food Solanaceae spiciness sweet sweet-pepper tasty vegetable yellow appearance Australian background bush bush-foliage central-Australia colored colors coloured colours distinctive flora greenery hardy light lines native native-plant outback plant texture wallpaper wildflowers bloom blossoms buds bush plant cap caps capsule conical dry eucalypts evergreen gum tree seed pods stamen strange tipped tips trees unusual unusual shape white bee insect blooming blooms pink