Membranous, tufted, bright red fronds, to 100 mm long. Frond with conspicuous midrib and wavy margin, to 6 mm wide, repeatedly branched from midrib, apices blunt. Numerous microscopic veins, at wide angle from midrib. 

Original publication: Agardh, J.G. (1898). Species genera et ordines algarum, seu descriptiones succinctae specierum, generum et ordinum, quibus algarum regnum constituitur. Vol. 3, Part 3. De dispositione Delesseriearum curae posteriores. pp. i-vii, 1-239. Lundae [Lund]: apud C.W.K. Gleerup.
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Kylin, H. (1924). Studien über die Delesseriaceen. Acta Universitatis Lundensis 20(6): 1-111, 80 figs.

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

Maggs, C.A. & Hommersand, M.H. (1993). Seaweeds of the British Isles. Volume 1. Rhodophyta. Part 3A. Ceramiales. pp. xv + 444, 129 figs, map. London: HMSO.

Wynne, M.J. (2005). A check-list of benthic marine algae of the tropical and subtropical western Atlantic: second revision. Beihefte zur Nova Hedwigia 129: 1-152.

Type species
This is the type species (lectotype) of the genus Apoglossum

Basionym
Fucus ruscifolius Turner

Type information
Holotype locality: Yarmouth, Norfolk, England (Turner 1802: 11). Lectotype: Amongst the rejectamenta of the sea. BM-K (Maggs & Hommersand 1993: 203).