bee attraction blooming budding buds composite composite bloom curved flora 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 perennial petals pin cushion shape pincushion pincushion protea plant plants pollen proteas shrub spikes stalks stamens stigma symmetric symmetry nectar bee honey insect open accommodation angles architectural-elements architecture balconies balcony buildings business city-scapes city-views colors colours commerce concrete contemporary contrast costly distance distant edges elements expensive exterior external glass hazy heights high high-rise light linear lines modern multi-storey multi-story perspectives recessed rooftops Singapore skyscrapers surfaces towering towers tree views walls wealth windows closed bloom shrubs appearances architectural box-like contrasting holidays hotel hotels surface tourism tourists Australian coral tree brittle branches color colored colorful colour coloured colourful curved petals deciduous dicotyledonous erythrina erythrina x sykesii fabaceae finger-like hardy hybrid invasive long petals non-seeding pest scarlet flowers sterile hybrid tall tree thorny tolerant tri-foliolate tubular petals upward-pointing radial pattern vigorous vigorously growing tree weed