Euphorbia triangularis

{{short description|Species of succulent plant found in southern Africa}}

{{Use South African English|date = May 2023}}

{{Speciesbox

| image = River Naboom (Euphorbia triangularis) (52844639244).jpg

| image_caption = E. triangularis in the Addo Elephant National Park

| image2 = Euphorbia triangularis Hambourg.jpg

| genus = Euphorbia

| species = triangularis

| authority = Desf. ex A.Berger

}}

Euphorbia triangularis, commonly known as river naboom, river euphorbia, chandelier-tree or tree euphorbia, is a species of plant in the family Euphorbiaceae native to southern Africa.{{Cite web|url =http://pza.sanbi.org/euphorbia-triangularis |title = Euphorbia triangularis |website = Plantzafrica.com | publisher=South African National Biodiversity Institute |access-date = 1 January 2021 | first=Bathabile | last=Ndlovu| date =September 2018}}