Swollen knob candelabrum
Bushy or candelabrum, with long branches usually dividing near colony base; to 7-30 cm tall.
Cylindrical in cross-section.
Dense, upright, thick branches, 5-10 mm across, to 30 cm long.
Crowded, conic to tube-shaped with slightly upturned lower lip, ~2 mm long but not longer than branch diameter, slightly compressed in cross section. Projecting calices around branches produce a knobby appearance. Bushy colonies have medium and large calices.
Beige, dark yellow to ochre, and occasionally purple. Dries brownish to tan. Light brown polyps.
Tentacular armature with rods to 0.17 mm long. Axial layer: sharp deeply purple spindles (0.16?0.4 mm long, 0.04?0.08 mm wide). Middle layer: ornamented spindles to 2 mm long, 0.38 mm wide (5-8 times longer than wide). Surface layer: dense torch-like clubs to 0.22 mm long.
Exposed or semi-exposed reefs to 20 m depth.
Bahamas, South Florida, and throughout the Caribbean Sea.