Agrostis petriei Hack. var. petriei; Agrostis petriei var. mutica Hack.
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 = 42
Current conservation status
The threat classification 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) – more information about this can be found on the NZTCS website 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. Please note, threat classifications are often suggested by authors when publications fall between NZTCS assessment periods – a suggested threat classification status has not been assessed by the NZTCS panel.
2017 | At Risk – Naturally Uncommon | Qualifiers: DP, Sp
Previous conservation statuses
2012 | At Risk – Naturally Uncommon | Qualifiers: DP, Sp
2009 | At Risk – Naturally Uncommon
2004 | Not Threatened
Endemic. South Island from Canterbury to Central Otago
Montane to subalpine on dry stony ground, cliff faces and rock outcrops. Also on river flats and within tussock grassland
Loosely erect, tussock forming, bluish-green to greyish green clump-forming grass 150-550 mm tall, with slender, involute, finely scabrid leaves
Manaaki Whenua Online Interactive Key
Agrostis petriei is readily recognised by its rigid, strictly involute, wiry blue-green to grey-green leaf-blades, which are very obviously, densely scabrid-papillose. Unlike the other indigenous Agrostis, A. petriei favours very dry sites within lowland to subalpine areas. It is usually found on rock outcrops or along river flats within ablation zones or within open stony pavements on river flats.
October - January
December - March
Florets are dispersed by wind and water (Thorsen et al., 2009).
Easy from fresh seed and rooted pieces but dislikes humidity and will not flower unless subjected to cold treatment
agrostis: Greek name for a kind of grass
petriei: Named after Donald Petrie (1846 -1925), Scottish born Otago botanist
Description modified from Edgar and Connor (2000).
References and further reading
Edgar, E.; Connor, H.E. 2000: Flora of New Zealand. Vol. V. Grasses. Christchurch, Manaaki Whenua Press. 650 pp.
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