Tetramolopium remyi is a member of the sunflower family (Asteraceae), is a much branched, decumbent (reclining with the end ascending) or occasionally erect shrub up to about 40 cm (15 in) tall. Its leaves are firm, very narrow, 1.5 to 3.5 cm (0.6 to 1.4 in) long, and with the edges rolled inward when the leaf is mature. There is a single flower head per branch. The heads are 0.9 to 15 cm (0.4 to 0.6 in) in diameter and on stalks 4 to 12 cm (1.6 to 4.7 in) tall; each comprises 70 to 100 yellow disk and 150 to 250 white ray florets. The stems, leaves, flower bracts, and fruit are covered with sticky hairs. Tetramolopium remyi has the largest flower heads in the genus. Two other species of the genus are known historically from Lanai, but both have purplish rather than yellow disk florets and from 4 to 60 rather than 1 flower head per branch.