萼形柱珊瑚（学名：Stylophora pistillata），又名萼柱珊瑚、柱状珊瑚，为鹿角珊瑚科柱珊瑚属下的一个种。

Stylophora pistillata (common names hood coral and smooth cauliflower coral) is a species of coral that is commonly used in scientific investigations. It is home to gall crabs, Trapezia crabs, boring clams, date mussels (Lithophaga), barnacles, Christmas tree worms and damselfish. Some such as Lithophaga are parasites that weaken the coral skeleton. However, boring clams bring fresh, oxygenated water into the colony and benefit the coral.