Monolluma quadrangula

{{Short description|Species of plant}}

{{Use dmy dates|cs1-dates=ly|date=June 2023}}

{{Speciesbox

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|taxon = Monolluma quadrangula

|authority = (Forssk.) Plowes

|synonyms =

{{Species list

|Boucerosia forskalii|Decne., nom. illeg.

|Boucerosia quadrangula|(Forssk.) Decne.

|Caralluma forsskalii|Plowsen, nom. superfl.

|Caralluma quadrangula|(Forssk.) N.E.Br.

|Ceropegia quadrangula|(Forssk.) Bruyns

|Desmidorchis forsskalii|Decne., nom. illeg.

|Desmidorchis quadrangula|(Forssk.) Kuntze

|Echidnopsis quadrangula|(Forssk.) Deflers

|Stapelia quadrangula|Forssk.

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Monolluma quadrangula is a species of flowering plant in the family Apocynaceae, native to the Arabian Peninsula (Oman, Saudi Arabia and Yemen). It was first described by Peter Forsskål in 1775 as Stapelia quadrangula.