Subspecies, varieties, forms and cultivars of plants belonging to the Euphorbia celastroides group

• Euphorbia celastroides Boiss.: (var. celastroides) Leaves narrowly obovate glabrous (without hairs). Distribution: endemic to Nihoa, Ni`ihau, Kaua`i.
• Euphorbia celastroides var. amplectens Sherff: Has pubescent (with hairs) leaves, grey/silverish to light green that may have a glaucous coating. Distribution: is a variable plant found on the uplands on all the main islands (Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.)
• Euphorbia celastroides var. hanapepensis Sherff: has glabrous, long and oblanceolate leaves. Distribution: endemic to Kaua`i where it grows at high elevations.
• Euphorbia celastroides var. kaenana Sherff: is a glabrous beach plant, with flowers (cyathia) on compact lateral branches. Distribution: endemic to to Kaʻena, Oʻahu. It is a rare and endangered beach plant found among the boulders.
• Euphorbia celastroides var. laehiensis O.Deg., I.Deg. & Sherff: Habit pubescent. Leaves glaucous. Distribution: endemic to Lana`i, Maui near Manawainui. It is found at low elevations and endangered.
• Euphorbia celastroides var. lorifolia (A.Gray ex H.Mann) Sherff: is a rare, small and vulnerable tree, with pubescent linear leaves found at high elevations. Distribution: endemic to Lana`i, Maui.
• Euphorbia celastroides var. stokesii (C.N.Forbes) Sherff: is a beach plant, glabrous. Leaves broadly obovate. Distribution: endemic to Ni`ihau, Kaua`i, Moloka`i, Kaho`olawe.
• Euphorbia celastroides var. tomentella (Boiss.) Oudejans: Tomentose. Distribution: Endemic to Waiʻanae Mts., O`ahu and presumed extinct.