Shrublands are dominated by ʻilima (Sida fallax), ʻaʻaliʻi (Dodonaea viscosa), naupaka (Scaevola spp.

argenteum), kīpūkai (Heliotropium curassavicum), maʻo (Gossypium tomentosum), ʻakoko (Euphorbia spp.

), ʻāheahea (Chenopodium oahuense), naio (Myoporum sandwicense), kolokolo kahakai (Vitex rotundifolia), and pūkiawe (Styphelia tameiameiae).

[2] More than 90% of the plant species found in this ecoregion are endemic, including ʻōhai (Sesbania tomentosa),[5] ʻāwiwi (Schenkia sebaeoides), and wahine noho kula (Isodendrion pyrifolium).

[6] Protected areas that cover part of the ecoregion include Koko Head District Park, Diamond Head, Mākua Kea'au Forest Reserve, Ka'ena Point State Park, and Kuaokala Forest Reserve on Oahu.