Australian coral tree brittle branches color colored colorful colors colour coloured colourful colours curved petals deciduous dicotyledonous erythrina erythrina x sykesii fabaceae finger-like flora flowers hardy hybrid invasive long petals non-seeding perennial pest scarlet flowers sterile hybrid tall tree thorny tolerant tri-foliolate tubular petals upward-pointing radial pattern vigorous vigorously growing tree weed appearance bell-shaped biennials blooming blooms clump-forming cultivars decorative Digitalis display distinctive downward-facing erect exotics floral flower-spikes foxglove garden garden-flowers garden-plants herbaceous horticultural horticulture light mottled nature ornamental perennials petals plants potent-glycosides shape shaped shapes tall-spikes textures toxic toxicity tubular unusual whorls beautiful beauty bulb bulbs bushland infestation bushland weed cluster competing competitive corm cormous plant creation delicate flower flowering plant fragile fragrance fragrant freesia alba x leichtlinii freesias funnel-shaped garden plant introduced species lines mauve narrow perfume perfumed plant popular prolific purple racemes scent scented seed seeder South African spike spikelike stem streaked strongly scented sweet tender weeds white yellow annuals anti-inflammatory antiseptic aroma aromatherapy asymmetric bee attraction blue buds calyx corolla dried dried arrangements dried flower arrangements essential oil flower plant foliage fresh garden flower heads hedge lavender lilac lobes mass plant moth repellent nard nardus natural nectar oil potpourris sachets shrub shrubs soothing spikes vegetation versatile violet angles architectural architecture brown building CBD city dark decoration design elements exterior external features gray green grey height high modern ornamentation perspectives Somber sombre surfaces walls petal succulent