Gossypium tomentosum, commonly known as Maʻo or Hawaiian cotton, is a species of cotton plant that is endemic to the Hawaiian Islands. It inhabits low shrublands at elevations from sea level to 120 m (390 ft). Maʻo is a shrub that reaches a height of 1.5–5 ft (0.46–1.52 m) and a diameter of 5–10 ft (1.5–3.0 m). The seed hairs (lint) are short and reddish brown, unsuitable for spinning or twisting into thread.