Hibiscadelphus crucibracteatus

Hibiscadelphus crucibracteatus (lava hau kuahiwi)^[3] is an extinct species of flowering plant in the family Malvaceae that was endemic to Hawaii, on the island of Lanai.

Hibiscadelphus crucibracteatus
Conservation status
Extinct (1982)  (IUCN 2.3)[1]
Possibly Extinct  (NatureServe)[2]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Malvales
Family:	Malvaceae
Genus:	Hibiscadelphus
Species:	†H. crucibracteatus
Binomial name
†Hibiscadelphus crucibracteatus Hobdy

It was discovered in 1981 on the Puhielelu Ridge and the single known specimen has since died, with collected seeds failing to germinate.^[1]