Oreobolus obtusangulus

{{Short description|Species of grass-like plant}}

{{Speciesbox

| image = Oreob imported from iNaturalist photo 255853170 on 7 December 2023.jpg

| genus = Oreobolus

| species = obtusangulus

| authority = Gaudich.

| synonyms = *Gaimardia australis

• Gaimardia pusilla
• Oreobolus clandestinus
• Oreobolus obtusangulus var. f. borealis

| synonyms_ref =

}}

Oreobolus obtusangulus is a thick cushion-forming, grass-like flowering plant species in the family Cyperaceae. It is native to South America. It grows in the highlands of Colombia and Venezuela and the alpine wetlands of central Chile and Neuquén Province of Argentina. Further south it grows at lower elevations including Tierra del Fuego and the Falkland Islands.{{cite web |url=https://sib.gob.ar/ficha/PLANTAE*oreobolus*obtusangulus |title=Oreobolus obtusangulus |author= |date= |website=Sistema de Información de Biodiversidad |publisher=Administración de Parques Nacionales |access-date=January 23, 2019 |quote=|language=Spanish}} Oreobolus obtusangulus grows in parts of Patagonia that were glaciated during the last glaciation. A genetic study suggested that the species survived glaciation in three separate glacial refugia; these being south-central Chile, the eastern Patagonian Andes and eastern Tierra del Fuego.{{cite journal |last1=Pfanzelt |first1=S. |last2=Albach |first2=D.|last3=von Hagen|first3=K.B. |date=2017 |title=Tabula rasa in the Patagonian Channels? The phylogeography of Oreobolus obtusangulus (Cyperaceae). |journal=Molecular Ecology |volume=26 |issue=15 |pages=4027–4044 |doi=10.1111/mec.14156 |pmid=28437593 |s2cid=46743451 }}