Characters: Colonies are submassive or form short columns which may branch. These have a smooth surface. Colour: Pale brown. Similar species: Porites nodifera, which has a similar growth-form, but corallite characters are distinct. Corallites of P. columnaris are similar to those of P. lutea and P. evermanni. Calice characters are closest to P. pukoensis. Habitat: Shallow reef environments. Abundance: Uncommon.