Commentaire : Corallum attached. Each coral with several mouths. Corallum shape varies from cupshaped to foliaceous. The outline is irregularly circular. The margin is either regularly flat or lobed and folded. The stomata are usually clearly visible. The primary stoma is the largest, the secondary stomata are evenly distributed around it. Maximum length of the coralla up to 80 cm. The septa are loosely packed and straight (except in lobed and folded margins). The septa of low order cycles are thick, those of higher orders thin. The septa of low orders are more protruding than those of higher orders. The septal margins are finely ornamented with ravel-shaped dentations. The solid corallum wall is covered by granulations. Costae from equal to subequal, they are straight and usually not distinct. The costae are finely ornamented with conical spines, either blunt or acute, which are covered by sharp granulations giving them an arborescent appearance.
Protection : basse