Rigid sea plume
Pinnate, plumose, to 1.5 m tall.
Pinnules round, long, tapered near tips, irregularly spaced, stiffer than others in the genus but still flexible.
Slit-like to oval, 1 mm across, in single irregular row or multiple series not strongly restricted to sides of pinnules. Also irregularly distributed or in winding row(s) along main branches.
Pale lavender both alive and preserved; dries tan to white.
Polyp armature: few small simple rods or none. Body wall: scaphoids (curved sclerites) with smooth convex profile and blunt tips bearing clusters of tubercles, 0.07-0.11 mm long; spindles blunt, to 0.13 mm long.
On reefs as shallow as 4 m, but typically deeper, 15-50 m.
South Florida, Bahamas, West Indies.