Hymenocallis littoralis

Description: Hymenocallis littoralis is a bulbous perennial herb. It ranges in height from 60–70 cm. The bulb is 7–10 cm in diameter. With age, the bulb develops a neck that reaches 4–5 cm in diameter. The flowers are large, white, vanilla scented, and sessile. The tepals are adnate (attached to) the staminal cup. Each flower’s tube is 14 to 17 cm long or longer. 

Flowering and Fruiting: Mid-summer to late autumn.

Economic Importance: Hymenocallis littoralis has allelochemical importance such as defensive compounds, insect repellents, attractants, and their role in ecological balance. Medicinal plants have antifungal, antibacterial and anti-inflammation activities. 

Reference: https://en.wikipedia.org/wiki/Hymenocallis_littoralis