Characters: Colonies are composed of thin,
contorted, bifacial, upright fronds with or
without thickened branching bases. Corallites are
fine, shallow and are aligned in irreg ...
Characters: Colonies are delicate, unifacial,
contorted, irregularly divided fronds, each frond
having just a few corallites. Tentacles are
sometimes extended during the day. ...
Characters: Colonies are laminar, either
encrusting or in whorls or tiers, with or without
radiating folds. Corallites are in irregular rows
parallel to the margins. They are ...
Characters: Colonies are flat plates which may be
encrusting or tiered. Corallites are closely
compacted, large, outwardly inclined, with a
tendency to form concentric rows. S ...
Characters: Colonies are columnar and/or thin
horizontal or encrusting plates. Individual
colonies are commonly mixtures of these
growth-forms. Columnar growth-forms occur whe ...
Characters: Colonies are encrusting or laminar
plates which frequently exceed one metre across.
Plates have small irregular folds on the surface.
Corallites are crowded betwee ...
Characters: Colonies are encrusting and do not
have a conspicuous central corallite. The surface
may be folded and sometimes forms tubes.
Corallites are inclined towards the c ...
Characters: Colonies are horizontal, unifacial,
subdividing fronds. Stands may be over 10 metres
across. Corallites are aligned on the centre of
narrow parts of fronds or seve ...
Characters: Colonies are submassive, laminar or
encrusting or various combinations of these.
Corallites are in short irregular valleys, or are
aligned between ridges perpendic ...
Characters: Colonies are upright, irregular,
usually contorted, anastomosing bifacial plates.
They are often over one metre across. Columellae
are wall-like lobes.
Colour: ...
Characters: Colonies consist of whorls of
delicate, unifacial, undivided or bifurcating
fronds. Valleys are shallow and parallel to frond
margins. There is almost no developme ...
Characters: Colonies are thin plates and/or
contorted fronds with narrow bases and which
divide irregularly. Plates usually have radiating
ridges which intergrade with fronds. ...