World Register of Marine Species (WoRMS)
Hypnea flagelliformis Greville ex J.Agardh, 1851
Guiry, M.D. & Guiry, G.M. (2026). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Hypnea flagelliformis Greville ex J.Agardh, 1851. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=145632 on 2026-08-29
Agardh, J. G. (1851). Species genera et ordines algarum, seu descriptiones succinctae specierum, generum et ordinum, quibus algarum regnum constituitur. Volumen secundum: algas florideas complectens. pp. 337 [bis]-351 [bis] 352-506. Lundae [Lund]: C.W.K.