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

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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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 2022-04-06 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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, 1 fig., 1 table.

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Contributors
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.

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

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 April 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 December 2024

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