Callitriche antarctica

Antarctic water-starwort
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Plantaginaceae
Genus:	Callitriche
Species:	C. antarctica
Binomial name
Callitriche antarctica Engelm. ex Hegelm. (1867)

Callitriche antarctica, commonly known as the Antarctic water-starwort, is a small, prostrate plant with tiny yellow flowers in the family Plantaginaceae (though sometimes placed in its own family – Callitrichaceae). It is found in wet places on many subantarctic islands and has a wide circumantarctic distribution, something reflected in its specific epithet.^[1]

The starwort is a prostrate, mat-forming herb, with freely branched stems, rooting at the nodes. It has a similar appearance to watercress. The small, fleshy, spathulate leaves are usually 3–5 mm long and 1–2.5 mm wide. Flowering occurs from September to March. The yellowish to dull brown fruits are about a millimetre in diameter.^[1]

The starwort occurs on Campbell, Heard and Macquarie Islands, the Auckland, Antipodes, Kerguelen, Prince Edward, Crozet and Falkland Islands, as well as on South Georgia and Tierra del Fuego. The plant may be locally common, especially in boggy areas, along streams and around freshwater pools.^[1][2]

• "Callitriche antarctica". Flora of Australia Online. Australian Biological Resources Study. 1993. Retrieved 2011-02-20.
• "Callitriche antarctica". The Flora of Bird Island Research Station. British Antarctic Survey. 2007. Archived from the original on 2013-01-20. Retrieved 2011-02-20.

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