Corallum explanate, foliate; showing faintly 2 or 3 shallow concentric grooves; edge rounded out, around 3 mm thick; around 12 mm thick at 12 cm inward from edge. Upper surface almost plane, except for very low mounds scattered here and there. Under surface covered with thin epitheca up to 3 cm from edge.
Corallites on upper surface dispersed, quite visible because of shortness of perithecal spines, flush with surface; calice around 0.75 mm diameter; not distinctly cut off from peritheca. Septal picture asymmetrical – often 3 or 4 primaries prominent, blunt, reaching beyond radius midpoints while remaining ones smaller, shorter. Secondaries incomplete cycle, usually only 3 or 4 present.
Corallites on under surface (not covered with epitheca) rather uneven in distribution, their septal picture markedly asymmetrical.
Peritheca with very obvious reticulum; covered all over with low spines of somewhat uniform height (around 0.5 mm); spines borne slightly on threads of reticulum, their free ends broke into few spinules (fimbriated). Spines give surface its velvety or finely granulose appearance.
