Tetramolopium arenarium is a rare species of flowering plant in the family Asteraceae known by the common name Maui tetramolopium.

It is a federally listed endangered species of the United States.

It was presumed extinct until it was rediscovered in 1989 in the Pohakuloa Training Area on the island of Hawaii.

The leaves are lance-shaped and toothed or smooth-edged and measure up to 3.7 centimeters in length.

[3] Threats to this species include habitat destruction and degradation by feral ungulates such as pigs, and competition from introduced species of plants such as fountain grass.