Bryopsis plumosa is a small, feathery species of green seaweed. The thalli are erect, feather-like and may reach up to 15 cm in height. It is easily recognised by its delicate branches. All branches are regularly arranged in two rows on opposite sides of the central filament. The lengths of the branches decrease gradually from the base of the plant. It is usually dark to mid-green in colour.

Original publication: Agardh, C.A. (1823). Species algarum rite cognitae, cum synonymis, differentiis specificis et descriptionibus succinctis. Volumen primum pars posterior. pp. [vii-viii], [399]-531. Lundae [Lund]: ex officina Berlingiana.

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Burrows, E.M. (1991). Seaweeds of the British Isles. Volume 2. Chlorophyta. pp. xi + 238, 60 figs, 9 plates. London: Natural History Museum Publications.

Dawes, C.J. & Mathieson, A.C. (2008). The seaweeds of Florida. pp. [i]- viii, [1]-591, [592], pls I-LI. Gainesville, Florida: University Press of Florida.

Lam, D.W. & Zechman, F.W. (2006). Phylogenetic analyses of the Bryopsidales (Ulvophyceae, Chlorophyta) based on RUBISCO large subunit gene sequences. Journal of Phycology 42: 669-678.

Loiseaux-de Goër, S. & Noailles, M.-C. (2008). Algues de Roscoff. pp. [1]-215, col. figs. Roscoff: Editions de la Station Biologique de Roscoff.

Pedroche, F.F., Silva, P.C., Aguilar-Rosas, L.E., Dreckmann, K.M. & Aguilar-Rosas, R. (2005). Catálogo de las algas marinas bentónicas del Pacífico de México. I. Chlorophycota. pp. i-viii, 17-146. Ensenada, México: Universidad Autónoma de Baja California.

Scagel, R.F. (1957). An annotated list of the marine algae of British Columbia and northern Washington (including keys to genera). Bulletin, National Museum of Canada 150: vi + 289.

Womersley, H.B.S. (1984). The marine benthic flora of southern Australia. Part I. pp. 329, 102 figs, 16 plates. Adelaide: Government Printer, South Australia.

Basionym: Ulva plumosa Hudson

Type locality: Exmouth, Devon, England (Silva, Basson & Moe 1996: 808). Notes: According to Womersley (1984: 282) the type is apparently lost.