These plants are usually solitary, its length is approximately 1 meter or even more, connected by a thick conical clamping. Simple or branched axis most of the times up to 1 meter in lenght, flattened, around 1 per 0.4 cm transverse section; it has a smooth apex. Has a lateral branched system which is radially symmetrical, sometimes bifurcate appendages on the branches of higher orders, leaving decurrent bases which cases an impression of an irregular zigzag sketch to the axis. Cryptostomata missing. Aerocysts are present in axes of branches of higher order. Receptacles are between 1-5 cm long, formed from axes of ultimate ramuli of irregular nodose and bearing simple, filiform.

Cited from: 

Michael Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 November 2013.