Digitate ↔ Columnar
Digitate refers to colonies showing finger-like projections like an upturned hand (e.g. the bottom of pg. 1 in the Coral Finder). Where these fingers become thicker and taller they may be referred to as sub-massive or columnar (e.g. p. 28 of the Coral Finder). Note sub-massive may be used to describe lumpy massive colonies described above, or knobbly columns.