Carex druceana var. astonii (Hamlin) Edgar
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 = c.60
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, Sp
Previous conservation statuses
2009 | At Risk – Naturally Uncommon | Qualifiers: DP
2004 | Gradual Decline
Endemic to the North Island, where it is apparently only known from the Kaimanawa and Ruahine Ranges.
Montane, subalpine to alpine river terraces, back swamps and on the margins of mires.
Small, reddish, tufted sedge. Mature culms 100-200 mm, smooth, terete, basal sheaths grey-brown or light-brown. Leaves > culms, up to 350 mm long x 0.7-1.2 mm wide, plano or concavo-convex, reddish, margins scabrid, apex curled (cirrhose). Inflorescence of 4-6 sessile spikes, lower most distant, upper approximate. Terminal spike male, rest female, these usually with male flowers at the base. Spikes 5-10(-150) x 3-5 mm, ovate or cylindrical. Glumes = to or < urticles, broadly ovate or oblong, pale brown with light red markings, emarginate, green midrib forming a short scabrid awn < 0.5 (rarely 1 mm) long. Utricles 2 x 1-1.3 mm, ovoid to rhomboid, usually trigonous, yellowish and red near tip, glossy, faintly ribbed, beak minute, black or red-brown, smooth, crura entire or bidentate, scabrid. Stigmas 3. Nut 1 x 1 mm, elliptic-obovoid, trigonous, cream to dark brown.
Carex druceana Hamlin (var. druceana in Flora of N.Z. Vol. II) has wider leaves, close packed spikelets (lower most rarely distant), glumes with awns up to 2 mm long, and by the utricles 2.5 x 1.3-1.5 mm. Both C. astonii and C. druceana resemble C. petriei in that they possess reddish, cirrhose-tipped leaves but both species lack the distinctive wide sheaths of C. petriei. Leaves of C. petriei are more rigid, the glumes more membranous, and the utricles are black except on the beak and stipe.
No information available
No information available
Nuts surrounded by inflated utricles are dispersed by granivory and wind (Thorsen et al., 2009).
Easy from fresh seed and the division of whole plants. Prefers moist soils, with a sunny aspect, free from weeds.
Rather local in its occurrences. Many of the habitats it was once recorded from in the 1950s and 1960s are now occupied by taller, faster growing weeds.
carex: Latin name for a species of sedge, now applied to the whole group.
astonii: After Aston
Description adapted from Moore and Edgar (1970).
References and further reading
Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Government Printer, Wellington.
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