appearance arid Australia Australian blood-red clianthus-formosus color coloration colored colorful colors colour coloured colourful colours contrast creeper creeping-plant creeping-vine crimson emblem emblematic fabaceae flora floral floral-emblem flower flowers glossy ground-cover light native pea-family perennial petals scarlet shade slow-growing South-Australian-emblem Sturt's-desert-pea sunlight sunshine swainsona-formosa vegetation wildflower willdampia-formosa ‘flower-of-blood' bloom garden kangaroo paws native australian plants butterfly caterpillar conservation milkweed Monarch native plants pollinator bush cotton fiber plant shrub soft biology cell cross-section Helianthus leaf magnification microscope sunflower blossoms botanics gardening herbs hyssop Hyssopus officinalis medicine nature purple summer