beautiful beauty bulb bulbs bushland infestation bushland weed cluster color colors colour colours competing competitive corm cormous plant creation delicate flora flower flowering plant flowers fragile fragrance fragrant freesia alba x leichtlinii freesias funnel-shaped garden plant herbaceous introduced species lines mauve narrow perennial perfume perfumed plant popular prolific purple racemes scent scented seed seeder South African spike spikelike stem streaked strongly scented sweet tender tubular weed weeds white yellow