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Name derivation:

(Gr.) hypo lower, glossum  tonguelike


Hypoglossum  Kützing  1843;  30 of 69 species descriptions are currently accepted taxonomically (Guiry and Guiry 2016).

Subclass Florideophyceae; Order Ceramiales; Family Delesseriaceae



Erect bushy thallus attached with small discoid holdfasts.  Slender, flat, brahched blades with an obvious midrib.  Species vary in height from a few mm (H. subsimplex to > 1 m (H. tenuifolium) (Dawes and Mathieson).

Similar genera:

Many species are separated from the basonym Delesseria Lamouroux 1813.


Subtropical to tropical marine shores.




Dawes, C.J. and A.C. Mathieson 2008. Seaweeds of Florida. University Press of Florida (592 pp).

Guiry, M.D. and G.M. Guiry  2014.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 30 May  2014.

Kützing, F.T.  1843.  Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange.  Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.

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, pls 7-13.