Species

Deyeuxia quadriseta

Etymology

Deyeuxia: after Deyeux

Current Conservation Status

2018 - At Risk - Declining

Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB

Previous Conservation Status

2012 - Not Threatened
2009 - Not Threatened
2004 - Not Threatened

Authority

Deyeuxia quadriseta (Labill.) Benth.

Family

Poaceae

Flora Category

Vascular - Native

NVS Species Code

DEYQUA

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.

Structural Class

Grasses

Synonyms

Avena quadriseta Labill., Agrostis quadriseta (Labill.) R.Br., Calamagrostis quadriseta (Labill.) Spreng.

Distribution

Indigenous. In New Zealand locally common from the Three Kings Islands and Te Paki south to Wellington. In the South Island, mainly eastern, uncommon. Recently (2000) found on Stewart Island

Threats

Not Threatened

Chromosome No.

2n = 56

Endemic Taxon

No

Endemic Genus

No

Endemic Family

No

Life Cycle and Dispersal

Florets are wind dispersed (Thorsen et al., 2009).

Taxonomic Notes

Two forms are present in New Zealand. The one described above is the same as the Australian plant and matches the type specimen in FI (P.J. de Lange pers. comm.). Another form, apparently endemic to the swamps and bogs of the Central North Island, is probably distinct but it is unclear as to whether it is endemic, or also occurs in Australia. Research into this problem is underway.

References and further reading

Gardner, R. 2002. Identifying Deyeuxia avenoides and D. quadriseta (Gramineae).  Auckland Botanical Society Journal, 57: 24-25

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

This page last updated on 24 Jul 2014