Dark red, hard consistency, cartilaginous, and may reach 30 cm in length thalli. Branches with obtuse apex and attenuated at the base. This species typically forms dense stands of clumped fronds, often under a Kelp canopy.

Link for Algae Handbook (Pereira, 2010).

Original publication: Lamouroux, J.V.F. (1813). Essai sur les genres de la famille des thalassiophytes non articulées. Annales du Muséum d'Histoire Naturelle, Paris 20: 21-47, 115-139, 267-293, Plates 7-13.

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Source of hydrocolloids - source of agar

Lee, H.-B. & Kim, J.-I. (1995). Notes on gelidiales species from Korea. In: Taxonomy of Economic Seaweeds. (Abbott, I.A. Eds) Vol.5, pp. 161-174. La Jolla, California: California Sea Grant College System.

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

Silva, P.C., Basson, P.W. & Moe, R.L. (1996). Catalogue of the benthic marine algae of the Indian Ocean. University of California Publications in Botany 79: 1-1259.

This is the type species (holotype) of the genus Gelidium

Basionym: Fucus corneus Hudson

Type locality: Devonshire, England (Lipkin & Silva 2002: 9).

Type: D. Miller; BM (ex herb. Buddle, Sloane collection) (Lipkin & Silva 2002: 9).