Antarctic Floristic Kingdom

Antarctic Floristic Kingdom

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According to Ronald Good, about 50 genera of vascular plants are common in the Antarctic plant kingdom, including "Nothofagus" and "Dicksonia". Takhtajan also made note of hundreds of other vascular plant genera scattered about and isolated on islands of the Southern Ocean, including "Calandrinia feltonii" of the Falkland Islands, "Pringlea antiscorbutica" of the Kerguelen Islands, and the megaherb genera of the New Zealand Sub-Antarctic Islands.

According to Takhtajan, 11 families are endemic to this kingdom: Lactoridaceae, Gomortegaceae, Hectorellaceae, Halophytaceae, Francoaceae, Aextoxicaceae, Tribelaceae, Griseliniaceae, Misodendraceae, Alseuosmiaceae and Donatiaceae.

ubdivisions

The Antarctic floristic kingdom is subdivided into four floristic regions, and subdivided even further into sixteen floristic provinces. Most of the provinces lie within, or very near the Antarctic convergence zone.

Fernandezian Region

(often included within the Neotropical Kingdom) Endemic family: Lactoridaceae; endemic genera: 20, including Thyrsopteris, Nothomyrcia, Selkirkia, Cuminia, Robinsonia, Rhetinodendron, Symphyochaeta, Centaurodendron, Yunquea, Hesperogreigia, Podophorus, Pantathera and Megalachne. Species endemism of vascular plants is very high (about 70%).::Fernandezian Province

Argentina-Chile-Patagonian Region

) and species.::Northern Chilean Province::Central Chilean Province::Argentine Pampas Province::Patagonian Province::Tierra del Fuego Province

outh Subantarctic Islands Region

Impoverished flora, no endemic families, two endemic genera (Pringlea and Lyallia)::Tristan-Goughian Province::Kerguelenian Province

Neozeylandic Region

. ::Lord Howe Province::Norfolkian Province::Kermadecian Province::Northern Neozeylandic Province::Central Neozeylandic Province::Southern Neozeylandic Province::Chatham Province::New Zealand Subantarctic Islands Province

ee also

*Flora of the Chatham Islands
*Antarctic flora

External links

* [http://www.britannica.com/eb/topic-27020/Antarctic-kingdom Encyclopedia Britannica]


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