angles appearance blue branch branches branching Cacti cactus clusters columnar edges flora frilled frills fruit fruiting garden-display green green-fruit height high irregular large leaf light long multiple-branched perennial points prickles Prickly protection ribbed ribbing shade shadows shapes sharp sky spikes spines succulent sunlight sunshine surface surfaces tall textures Unripe unusual bee attraction budding buds composite composite bloom curved floral flower flower-head flowering shrub flowers foliage garden flower garden plant Harry Chittick leaves leucospermum cordifolium multiple nature opening orange orange-red stalks patterns petals pin cushion shape pincushion pincushion protea plant plants pollen proteas shrub stalks stamens stigma symmetric symmetry bee honey insect nectar open abundant Australia Australian bloom bottlebrush bright-red bush bush-plant callistemon callistemon-viminalis color colored colorful colors colour coloured colourful colours common contrast contrasting distinctive evergreen flower-spikes flowering full-bloom native red shape spring tree weeping-bottlebrush wildflowers blooming blooms bright coloring colouring dangerous display fine garden garden-plants pointed protective risks skin soft-wooded-perennial spination spiny texture to-the-point