Delissea undulata

Delissea undulata is an extremely rare species of "palmoid" or "Corner model tree" formerly occurring on the Big Island of Hawai'i. It is cited as Extinct by the IUCN Red List and Plants of the World Online, but is also reported in cultivation from a single surviving plant found in 1992. It is in the subfamily Lobelioideae of the family Campanulaceae. The tree is up to in height but only in diameter at breast height. It never branches. The terminal rosette of wavey-edged leaves is only across. The flowers are tubular and straight.