Tin Range speargrass
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.
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
Previous conservation statuses
2009 | At Risk – Naturally Uncommon
2004 | Range Restricted
Endemic. Stewart Island, Tin Range between Blaikies Hill and Mt Allen.
Subalpine to alpine (550-760 m a.s.l.), in exposed situations, though usually partially sheltered by other shrubs and tussock grases
Stout rosette-forming herb with ascending leaves. Rosettes 1-8(- many). Leaves cartilaginous, orange-green, up to 320 mm or more long, 1-pinnate with 1-2 pairs of leaflets; sheath up to 54 x 8-17 mm; stipules simplex, up to 27 x 1 mm, sometimes absent, spaced up to 6 mm apart at insertions; petiole up to 60 x 6 mm, often shorter, concave, margins acute, sheath joint obscure, pulvinus obscure or rarely evident then up to 5 mm long; lamina more or less obtrullate in profile; lowermost leaflet up to 220 x 5 mm with an apical spine up to 6 mm long, margin and midribs up to 1 mm wide, yellow or orange, margins often raised; marginal tubercles coarse up to 0.15 mm wide, often forming a discontinuous series. Inflorescences narrow. Female inflorescences 0.4-1 m long, with stems up to 250 x 10 mm, reddish brown; head up to 150 x 20 mm, more or less lanceolate in outline; compound umbels up to 22; lower bracts up to 100 mm long with a sheath up to 28 x 8 mm, stipules up to 12 x 1 mm, lamina simple up to 75 x 3 mm, segments ascending to appressed. Lower compound umbels up to 25 mm long, peduncles up to 6 x 1.4 mm, primary bracteoles minute, umbels up to 4 each with peduncles up to 8 x 1mm, the innermost umbels often sessile, secondary bracteoles few up to 2 x 0.8 mm. Flowers up to 10 per umbel; pedicels up to 2 x 0.9 mm, sepals up to 0.3 mm; petals 1 x 0.6 mm, not inflexed, median oil tube red-brown, staminodes up to 0.6 mm long. Male inflorescence up to 380 mm long, stems up to 150 x 6 mm, reddish-brown; head 230 x 50 mm, narrow-ovate in outline; compound umbels up to 27; lower bracts up to 85 mm long, sheaths up to 30 x 4 mm, stipules up to 10 x 1 mm, lamina simple, up to 54 z 2 mm, segments ascending. Lower compound umbels up to 47 mm long, peduncles up to 23 x 1 mm, primary bracteoles minute; umbels up to 9 with peduncles up to 16 x 0.9 mm, the innermost umbels sessille to subsessile; secondary bracteoles 6-7, up to 1.5 x 0.3 mm. Flowers 12 per umbel, pedicels 3 x 0.4 mm; sepals 0.3 mm long; petals 1.1. x 0.75 mm, not inflexed, median oil-tube conspicuous, red-brown; stamens 1.75 mm long. Mericarps up to 8 x 3.3 mm, pale brown, glossy, each pair with 5/3 or 4/3 ribs; lateral ribs up to 0.5 mm wide; styles up to 1.2 mm long.
Close to A. trifoliolata Petrie, which is endemic to the South Island on the Lyell Range north of the Buller Gorge. From A. trifoliolata, A. stannensis differs by the petiole < 1/3 as long as the lamina (1/2 in A. trifoliolata), the sheath joint obscurerather than conspicuous, leaflet margin-ribs and midribs 1 mm rather than 0.5 mm wide, female pedicels stout not slender, female petals < 2 as long and broad (rather than 3x longer than broad), larger mericarps (8 x 3 cf. 6 x 1.5 mm) and by the mericarp ribs 0.5 rather than 0.2 mm wide.
January - February (more information needed)
February - April (more information needed)
Winged schizocarps are dispersed primarily by wind (Thorsen et al., 2009).
Unknown. The few available reports for this species suggest it is a very localised, narrow range endemic common within its known habitats. It maybe threatened from browsing by white-tailed deer although there have been no reports of this.
aciphylla: From the Latin acicula ‘needle’ and the Greek phyllum ‘leaf’, meaning needle-leaf.
stannensis: After The Tin Range, Stewart Island
Where To Buy
Not commercially available
Fact Sheet Prepared by P.J. de Lange (1 November 2009). Description based on Dawson (1980).
References and further reading
Dawson, J. W. 1980: Aciphylla trifoliolata Petrie and A. stannensis sp. nov. New Zealand Journal of Botany 18: 115-120.
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 11: 285-309.
Please cite as: de Lange, P.J. (Year at time of access): Aciphylla stannensis Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/aciphylla-stannensis/ (Date website was queried)