Montipora patula, also called the sandpaper or ringed rice coral, is a coral species in the family Acroporidae endemic to Hawaii and is considered a vulnerable species.

[1] Montipora patula form small, encrusting colonies or tiered plates that are brownish in color with lighter borders.

[2][3] These plates have free edges and can reach over 2 meters across.

[4] Corallites are irregular in height and are generally small.

[4] Around the corallites are small papillae, that are usually tan in color.