Panicum niihauense H. St. John

Panicum niihauense H. St. John. Panicum niihauense is a rare species of grass known by the common names lau ʻehu and Niʻihau panicgrass. It is endemic to Hawaii, where it has been found on the islands of Niʻihau and Kauaʻi. It has not been observed on Niʻihau since 1949, and there are fewer than 40 individuals remaining on Kauaʻi, not counting a few individuals that have been deliberately planted in appropriate habitat. The grass is a federally listed endangered species of the United States.