Its habitat includes moist, rocky, seaside grassland.

It produces two or three keeled, lance-shaped leaves up to 100 centimeters long by three wide.

The inflorescence arises on an erect stem up to 90 centimeters tall and bears an umbel-like cluster of many flowers.

Each flower is a funnel-shaped lavender or light blue bloom with six lobes measuring up to 1.5 centimeters long.

Although this species is found on only one island, the main threat to its existence, herbivory by feral pigs and goats, has been eliminated.