The Hawaiian tropical low shrublands are a tropical savanna ecoregion in the Hawaiian Islands.
These shrublands cover an area of in the leeward lowlands of the main islands and most of the smaller islands, not including the Northwestern Hawaiian Islands which form an ecoregion of their own.
The ecoregion includes both grasslands and mixed shrublands. KÃÂwelu (Eragrostis variabilis), mauu akiaki (Fimbristylis cymosa), akiaki (Sporobolus virginicus), and Lepturus repens are common grassland plants. Shrublands are dominated by ilima (Sida fallax), aalii (Dodonaea viscosa), naupaka (Scaevola spp.), hinahina kà « kahakai (Heliotropium anomalum var. argenteum), këpà «kai (Heliotropium curassavicum), mao (Gossypium tomentosum), akoko (Euphorbia spp.), ÃÂheahea (Chenopodium oahuense), naio (Myoporum sandwicense), kolokolo kahakai (Vitex rotundifolia), and pà «kiawe (Styphelia tameiameiae). More than 90% of the plant species found in this ecoregion are endemic, including à Âhai (Sesbania tomentosa), ÃÂwiwi (Schenkia sebaeoides), and wahine noho kula (Isodendrion pyrifolium).
Protected areas that cover part of the ecoregion include Koko Head District Park, Diamond Head, MÃÂkua Kea'au Forest Reserve, Ka'ena Point State Park, and Kuaokala Forest Reserve on Oahu.