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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Cladus: Commelinids
Ordo: Poales

Familia: Poaceae
Subfamilia: Panicoideae
Tribus: Paniceae
Subtribus: Cenchrinae
Genus: Alexfloydia
Species: A. repens

Alexfloydia B.K.Simon, Austrobaileya 3: 670 (1992)

monotypic taxon


Simon, B.K. 1992. Austrobaileya 3(4): 670.
Govaerts, R. et al. 2013. Alexfloydia in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2013 Oct. 27. Reference page.
Simon, B.K., Clayton, W.D., Harman, K.T., Vorontsova, M., Brake, I., Healy, D. & Alfonso, Y. 2013. GrassWorld, Alexfloydia. Published on the internet. Accessed: 2013 Oct. 27. 2013. Alexfloydia. Missouri Botanical Garden. Published on the internet. Accessed: 2013 Oct. 27.
International Plant Names Index. 2013. Alexfloydia. Published online. Accessed: 27 Oct. 2013.

Alexfloydia is a genus of perennial stoloniferous grasses in the panic grass subfamily of the Poaceae grass family.[1][2]

This genus is endemic to coastal eastern New South Wales in Australia.

There is one known species, Alexfloydia repens.[3] This genus was named in honour of the species discoverer, Australian botanist Alexander Floyd (1926-).[4][5]

Habitat and distribution

Alexfloydia repens is a spreading, mat-forming grass found on the margins of brackish and tidal waterways in areas flooded by unusually high tides (called "king tides").[6] The species forms a groundcover associated with the tree species Casuarina glauca and the Endangered Ecological Community Swamp Oak Floodplain Forest. Currently this grass is known only from a few locations in the Coffs Harbour region.

This species is listed as Endangered on the schedules of the NSW Threatened Species Act.[7]

Alexfloydia repens is the sole larval food plant for the endangered Black grass-dart butterfly (Ocybadistes knightorum) (Lambkin & Donaldson, 1994).[8]
See also

List of Poaceae genera


Watson L, Dallwitz MJ. (2008). "The grass genera of the world: descriptions, illustrations, identification, and information retrieval; including synonyms, morphology, anatomy, physiology, phytochemistry, cytology, classification, pathogens, world and local distribution, and references". The Grass Genera of the World. Retrieved 2009-08-19.
Simon, B.K. 1992. Studies in Australian grasses 6. Alexfloydia, Cliffordiochloa and Dallwatsonia, three new panicoid grass genera from Eastern Australia. Austrobaileya 3:669-681.
"Alexfloydia". The Grass Genera of the World. Archived from the original on 14 May 2008. Retrieved 2008-04-02.
"Alexander G. Floyd (1926 - )". Australian National Herbarium. Retrieved 2008-04-02.
Atlas of Living Australia, Alexfloydia B.K.Simon
Tidal Variations — The Influence of Position and Distance NOAA ocean service education
"Black grass-dart butterfly - endangered species listing". Department of Environment & Climate Change (NSW). Archived from the original on 2006-09-07. Retrieved 2008-04-02.
"Alexfloydia repens (a grass) - endangered species listing". Department of Environment & Climate Change (NSW). Retrieved 2008-04-02.

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