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Antarctic Floristic Kingdom: Map

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Antarctic Floristic Kingdom (also Holantarctic Kingdom) is a floristic region first identified by botanist Ronald Good (and later by Armen Takhtajan), which includes most areas of the world south of 40°S latitude. The Antarctic plant kingdom includes the continent of Antarcticamarker, Patagonia (southern Chilemarker, southern Argentinamarker, Tierra del Fuegomarker), most of New Zealandmarker, the New Zealand Sub-Antarctic Islandsmarker, and all islands of the Southern Oceanmarker south of 40°S latitude, including Gough Islandmarker, the Kerguelen Islandsmarker, and the Falkland Islandsmarker. Tasmaniamarker is omitted since its plant species are more closely related to those found in the Australian Floristic Kingdom. Good noted, as had Joseph Dalton Hooker much earlier, that many plant species of Antarctica, temperate South America and New Zealand were very closely related, despite their disjunction by the vast Southern Oceanmarker. The flora of this kingdom dates back to the time of Gondwana, the southern supercontinent which once included most of the landmasses of the present-day Southern Hemispheremarker, though it has been influenced by the flora of the Holarctic Kingdom since the Tertiary.

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.

Subdivisions

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, Juania, 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

families: Gomortegaceae, Halophytaceae, Malesherbiaceae, Tribelaceae, Francoaceae, Aextoxicaceae, Misodendraceae, many endemic genera (including Leptocionium, Saxegothaea, Austrocedrus, Pilgerodendron, Fitzroya, Peumus, Boquila, Lardizabala, Philippiella, Austrocactus, Holmbergia, Berberidopsis, Niederleinia, Lebetanthus, Ovidia, Quillaja, Kageneckia, Saxifragella, Zuccagnia, Tepualia, Magallana, Gymnophyton, Laretia, Mulinum, Talguenea, Schizanthus, Melosperma, Monttea, Hygea, Mitraria, Sarmienta, Chiliotrichum, Melalema, Nassauvia, Tetroncium, Gilliesia, Leontochir, Leucocryne, Schickendantziella, Solaria, Lapageria, Conanthera, Tecophilaea, Tapeinia, Fascicularia, Ortachne, Jubaea) and species.
:Northern Chilean Province
:Central Chilean Province
:Argentine Pampas Province
:Patagonian Province
:Tierra del Fuego Province


Neozeylandic Region

family: Ixerbaceae an endemic monogeneric family of one species, Ixerba brexioides. The Ixerbaceae is the only endemic New Zealand vascular plant family. 50 endemic genera (including Loxsoma, Pseudowintera, Hectorella, Entelea, Hoheria, Corokia, Alseuosmia, Carmichaelia, Lophomyrtus, Neomyrtus, Plectomirtha, Stilbocarpa, Kirkophytum, Coxella, Lignocarpa, Scandia, Dactylanthus, Myosotidium, Parahebe, Negria, Rhabdothamnus, Teucridium, Oreostylidium, Pachystegia, Haastia, Leucogenes, Phormium, Rhopalostylis, Lepidorrhachis, Hedyscepe, Howea, Sporadanthus, Aporostylis, Desmoschoenus), very high species endemism, especially among Pinophyta.
:Lord Howe Province
:Norfolkian Province
:Kermadecian Province
:Northern Neozeylandic Province
:Central Neozeylandic Province
:Southern Neozeylandic Province
:Chatham Province
:New Zealand Subantarctic Islands Province


See also



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