163,902 species and infraspecific names are in the database, 22,783 images, 63,101 bibliographic items, 483,547 distributional records.

Sargassum C.Agardh, 1820, nom. et typ. cons.

Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Phaeophyceae
Subclass Fucophycidae
Order Fucales
Family Sargassaceae

Holotype species: Sargassum bacciferum (Turner) C.Agardh

Currently accepted name for the type species: Sargassum natans (Linnaeus) Gaillon

Original publication and holotype designation: Agardh, C.A. (1820 '1821'). Species algarum rite cognitae, cum synonymis, differentiis specificis et descriptionibus succinctis. Volumen primum. Pars prima. pp. [i-iv], [1]-168. Lundae [Lund]: ex officina Berlingiana.
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Silberfeld, T., Rousseau, F. & Reviers, B. de (2014). An updated classification of brown algae (Ochrophyta, Phaeophyceae). Cryptogamie Algologie 35(2): 117-156.

Taxonomic notes
Description after Womersley (1987). - (2 Jun 2006) - Wendy Guiry

Description: Thallus to 10-200 cm or more in length, with one to a few simple, terete to compressed, stipes 1-20 cm long arising from a discoid-conical holdfast. Stipes bearing radially or distichously borne, long primary branches, produced seasonally from the stipe apices and subsequently deciduous, leaving scars or other residues on the stipe. Primary branches 10 cm to 200 cm or more long, distichously, tristichously or radially branched with a terete, angular, compressed or three-sides axes; basal laterals simple or branched, compressed and relatively narrow to (in most species) leaf-like, (1-)3-15(-25) mm broad, entire ot with dentate margins; upper laterals usualy branched, with slender, compressed to terete, ramuli. Air bladders (vesicles) normally present, subspherical to ovoid, petiolate, mutic or apiculate, replacing ramuli or axilliary to the laterals. Growth from a 3-sided cell in an apical depression. Structure of a central medulla of elonagate cells in the stipe and branch axes, with a core of isodiametric cells and a surface of phaeoplastic meristoderm, active in the larger branched. Reproduction. Thallus monoecious or dioecious. Receptacles unisexual or bisexual, developed in axils of laterals or ramuli, simple or usually in branched clusters, terete or compressed, smooth, verrucose or spinous, with scattered conceptacles and ostioles, growing apically with conceptacles maturing below; conceptacles unisexual or bisexual. Sections Ilicifoliae and Binderianae emended by Matteo et al. (2010: 901).

The most recent alteration to this page was made on 19 Oct 2015 by M.D. Guiry.

Common names

(as Sargassum)
Indonesian: Bebojot (Chapman & Chapman 1980).

Numbers of names and species: There are 539 species names in the database at present, as well as 430 infraspecific names. Of the species names, 360 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.


Yip, Z.T., Quek, R.Z.B. & Huang, D. (2019). Historical biogeography of the widespread macroalga Sargassum (Fucales, Phaeophyceae) . Journal of Phycology 56(2): 300-309.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Created: 28 December 2000 by M.D. Guiry

Verified by: 19 October 2015 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=77

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 October 2021.

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