Cartilaginous, cylindrical to compressed, bow-red to blackish purple fronds, to 75 mm high, from an expanded discoid base. Repeatedly dichotomous and fastigiate, with rounded, somewhat flattened apices (MACOI, 2013). Generally with rounded excrescences (reproductive bodies known as tetrasporoblasts).

Cited from:

http://www.horta.uac.pt/species/algae/Gymnogongrus_griffithsiae/Gymnogongrus_griffithsiae.htm, 2013