Australia bottle bottlebrush brush flower red bright bush callistemon flowers fuzzy garden natural nature plants shrub stamens flowerhead bristly flowering madeira tree bud buds emerge open unfold abundant appearance Australian bloom branches bright-red bush-plant callistemon-viminalis color colored colorful colors colour coloured colourful colours common contrast contrasting distinctive evergreen flora flower-spikes foliage full-bloom green leaves light native nectar plant shade shape spring sunlight sunshine weeping-bottlebrush wildflowers