Althenia F.Petit, 1829

Holotype species: Althenia filiformis Petit

Original publication and holotype designation: Petit, F. (1829). Althenia novi plantarum generis descriptio. Annales des Sciences d'Observation 1: 451-456.

Description: Monoecious or dioecious, annual or perennial herbs. Leaves alternate, with floral leaves often apparently subopposite and frequently crowded toward stem apex, basal sheath present; sheath or stipule adnate to leaf blade for most of its length, with or without conspicuous nerves; ligule well developed, frequently bifid; blade linear, with or without lateral nerves. Flowers sessile or pedicellate. Male flowers consisting of single stamen and a 3- segmented perianth; pedicel short at first, elongating at anthesis; anther mass sessile or subsessile, with 2–6 locules united longitudinally and dorsally. Female flowers with a perianth divided into 3 segments; carpels 3, free; style slender; stigma symmetrical or asymmetrical, peltate-, feathery (laciniate)-, to funnel-shaped. Fruit an achene.

Information contributed by: Ito & al. (2016). The most recent alteration to this page was made on 2020-11-17 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 feminine.

Most recent taxonomic treatment adopted: Ito, Y., Tanaka, N., García-Murillo, P. & Muasya, A.M. (2016). A new delimitation of the Afro-Eurasian plant genus Althenia to include its Australasian relative, Lepilaena (Potamogetonaceae). Evidence from DNA and morphological data. Molecular Phylogenetics and Evolution 98: 261-270, 4 figs.

Loading names...
Loading notes...
Loading common names...
Loading references...

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

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44020

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 17 November 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 March 2024

 
Currently in AlgaeBase: