Caustis dioica

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

{{speciesbox

|name =

|image = Caustis dioica (male phase) - Flickr - Kevin Thiele (1).jpg

|image_caption = Male

|status =

|status_system =

|genus = Caustis

|species = dioica

|authority = R.Br.

|}}

File:Caustis dioica (female phase) - Flickr - Kevin Thiele.jpg

Caustis dioica is a sedge that is native to Western Australia.{{FloraBase|name=Caustis dioica|id=760}}

The monoecious and rhizomatous perennial sedge has a tangled, tussocky habit. It typically grows to a height of {{convert|15|to|70|cm|in|0}} and a width of {{convert|50|cm|in|0}} and has pungent smelling leaves. The plant blooms between September and December producing yellow-brown flowers.

It is found in the Mid West, Wheatbelt, South West, Great Southern and Goldfields-Esperance regions where it grows in sandy-loamy soils.