Nototrichium humile
 Nototrichium humile is a rare species of flowering plant in the amaranth family known by the common names kaala rockwort and kulu'i. It is endemic to Hawaii where it is now limited to the island of Oahu having been extirpated from Maui. It is a federally listed endangered species of the United States.The main threat to the species is fire. Most populations occur on the Makua Military Reservation in the Waianae Range of Oahu in territory at high risk for fire.