Vascular – Native
Dicotyledonous Herbs other than Composites
The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.
2n = 40
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2017 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants. Authors: By Peter J. de Lange, Jeremy R. Rolfe, John W. Barkla, Shannel P. Courtney, Paul D. Champion, Leon R. Perrie, Sarah M. Beadel, Kerry A. Ford, Ilse Breitwieser, Ines Schönberger, Rowan Hindmarsh-Walls, Peter B. Heenan and Kate Ladley.
2012 | At Risk – Naturally Uncommon | Qualifiers: RR, SO
Previous conservation statuses
2009 | At Risk – Naturally Uncommon
2004 | Range Restricted
Indigenous. In New Zealand known from Campbell and Auckland Islands. Also on Macquarie, Heard Island and Tasmania. Probably elsewhere on the subantarctic islands.
Coastal to montane in damp, peaty and boggy ground. Common around sea bird nesting grounds, penguin rookeries and seal haul outs. Prefers open, disturbed habitats,
Tufted to spreading, much branched, succulent perennial herb forming dense bright to dark green patches on mud. Branches thick, creeping below with ascending branches up to 100 mm long. Leaves on stout petioles 2-3 mm long, lamina succulent, 2.5-10 x 1.5-4.8 mm, dark green to light green, spathulate to oblong-spathulate, 3-nerved, sometimes with free veins, apex rounded, base scarious. Flowers solitary, males in upper and femal lower axils, ebracteate or with bracts shedding early. Filaments to 13 mm, tapering from broad base. Mericarp more or less elliptic, laterally compressed, 0.9-1.2(-1.5) mm long, surface reticulate, or colliculate, dull pale orange-yellow, orange-brown or dark brown.
Callitriche aucklandica R.Mason is similar but differs by its longer, laxly creeping, rather than ascending stems, fleshy rather than succulent leaves with broadly fused petioles, shorter filaments (9 cf. 1.3 mm) and larger fruits (1.0-1.6 cf. 0.9-1.5 mm).
November - December
December - January
Mericarps possibly by water and attachment (Thorsen et al., 2009).
Probably easy. However, not known to have been cultivated.
Not Threatened. Listed becaus ein the New Zealand region it has a restircted geographic range.
callitriche: From the Greek kalli ‘beautiful’ and thrix ‘hair’, referring to the beautiful stems
Fact sheet prepared by P.J. de Lange for NZPCN (1 June 2013)
References and further reading
Thorsen, M. J.; Dickinson, K. J. M.; Seddon, P. J. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 2009 Vol. 11 No. 4 pp. 285-309
Please cite as: de Lange, P.J. (Year at time of access): Callitriche antarctica Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/callitriche-antarctica/ (Date website was queried)