Botanical name: Dietes robinsoniana
Common name: Lord Howe Wedding Lily
Family: Iridaceae
Origin: Australia
Dietes robinsoniana, the Lord Howe Wedding Lily is found naturally only on Lord Howe Island. This is the largest plant in the genus Dietes.
A sequence of large pure white flowers with yellow markings toward the centre are produced on a candelabra-like inflorescence that can produce 5-10 flowers; each flower may only stay open for one day.
In the wild it grows in large swathes on rocky headlands close to the shore in full sun.
Similar plants: Dietes robinsoniana (Lord Howe Wedding Lily)
Link to this plant:
https://toptropicals.com/catalog/uid/dietes_robinsoniana.htm