Species

Juncus caespiticius

Etymology

Juncus: From the Latin jungere 'to tie or bind', the stems of some species being used to make cord (Johnson and Smith)
caespiticius: From the Latin caespes 'tuft' or 'sod of turf', meaning made of turf or turf-like

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

Juncus caespiticius Meyer in Lehm.

Family

Juncaceae

Flora Category

Vascular - Native

NVS Species Code

JUNCAE

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

Rushes and Allied Plants

Synonyms

None

Distribution

Indigenous. North and South Islands. Present in Australia

Habitat

Usually coastal. Growing in or near damp seepages, or on steep, damp cliff faces festooned with Blechnum blechnoides (Bory) Keyserl., Sonchus kirkii Hamlin, Machantia macropora Mitt. and Nostoc. Very rarely in dune swales or around the margins of brackish lagoons and streams. Also recorded on rock bluffs up to 500 m a.s.l.

Features

Tufted, dark green to red-green perennial forming circular patches up to 100 mm diameter. Stems 80-450 x 1-2 mm. Leaves numerous, all basal, grass-like, << stems, solid, non-septate, lamina stiffly coriaceous, flattened at base and up to 8 mm wide, involute above and tapering to a slightly dilated tip, often mucronate in young leaves; sheath very broad and often pink-coloured, without auricles. Inflorescence terminal, contracted in most New Zealand plants into a many flowered, globose, bracteate red-brown to brown head (very rarely branched), bracts subtending inflorescence, 1-3, foliose with at least one >> inflorescence. Flowers 3 mm long; outer tepals acute or acuminate, shorter than the inner, more membranous, subobtuse tepals. Stamens 6. Capsule more or less equal in length to tepals, obtuse, mucronate.

Similar Taxa

Distinguished from J. planifolius R.Br., J. lomatophyllus Spreng., and J. dregeanus Kunth by the inflorescence which is usually a single, globose head, and by the broadly channelled leaves. Over the last 20 or so years a very similar, bright green to yellow green-leaved rush with dark black globose inflorescences has colonised the west coast of the North Island, initially around the Waitakere Coast but now known as far north as Hokianga and possibly as far south as Wanganui. This rush appears to be Australian, although as yet not one has determined which species it is. It is widely known as J. aff. caespiticius or J. aff. dregeanus.

Flowering

September - January

Fruiting

October - July

Propagation Technique

Easily grown from fresh seed. An interesting pot plant or species for a damp place within a rockery. Has considerable horticultural potential.

Threats

Not Threatened but now declining or extinct north of the Waikato.

Endemic Taxon

No

Endemic Genus

No

Endemic Family

No

Life Cycle and Dispersal

Mucilaginous seeds are dispersed by attachment, wind and water (Thorsen et al., 2009).

Where To Buy

Not commercially available

Attribution

Fact Sheet prepared for NZPCN by P.J. de Lange (1 September 2006). Description based on Moore & Edgar (1970).

References and further reading

Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. I. 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 11: 285-309

This page last updated on 30 May 2015