Hamlin’s hook grass, Hamlin’s bastard grass
Uncinia astonii Hamlin
Vascular – Native
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 = 88
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 | Not Threatened
Previous conservation statuses
2009 | Not Threatened
2004 | Not Threatened
Endemic. New Zealand. North Island( Southern Ruahine and Tararua Ranges), South Island (Nelson, Westland, Otago, Fiordland)
Usually associated with the understorey of beech (Nothofagus) forest, growing at altitudes of between 300–1200 m a.s.l.
Dark green, densely caespitose plants. Culms 0.2-0.6 m long, < 0.5 mm diameter, glabrous; basal bracts light brown. Leaves 3-6 per culm, = or < culms, 1-2 mm wide, light yellow-green or rarely red, occasionally involute, rather wiry, margins finely scabrid. Spikes 40-100 × 3–5 mm, occasionally bracteate, female flowers c. 10-20, distant in lower third of spike with internodes to 9 mm long, more crowded above with internodes 2-5 mm long. Glumes usually = but occasionally < or > utricles, deciduous, lanceolate, acute, hyaline, light brown throughout. Utricles 5.5-7.0 × c.1 mm, plano-convex or subtrigonous, elliptic-lanceolate, grey-green, membranous, nerved, erect or spreading when ripe, distinctly contracted below to a stipe slightly < 1.5 mm long, gradually tapered above to a beak 1.5-2.0 mm long
This fine-leaved species has a superficial resemblance to Carex subviridis K.A.Ford which also has a gracile habit, and rather fine light-green leaves and lax inflorescences. From that species it is easily distinguished by its glabrous rather than scabrid utricles.
November - December
December - March
Easily grown from fresh seed and by the division of established plants (though these may then take a while to settle). Prefers a shaded site, and should be planted within a deep, rich, free draining but permanently moist soil
carex: Latin name for a species of sedge, now applied to the whole group.
Where To Buy
Not Commercially Available
Description adapted from Moore and Edgar (1970). Fact sheet prepared by Peter J. de Lange 17 August 2006.
References and further reading
Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Government Printer, Wellington.
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Carex hamlinii Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/carex-hamlinii/ (Date website was queried)