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  4. Libertia grandiflora

Libertia grandiflora

Flower detail, Te Marua.<br>Photographer: Colin C. Ogle, Date taken: 11/11/1972, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
At Kauaeranga valley, December.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Remutaka Rail Trail.<br>Photographer: Jeremy R. Rolfe, Date taken: 02/12/2006, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Remutaka Rail Trail.<br>Photographer: Jeremy R. Rolfe, Date taken: 02/12/2006, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Kauaeranga valley, December.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Holdsworth, Tararua Forest Park.<br>Photographer: Jeremy R. Rolfe, Date taken: 06/11/2005, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Holdsworth, Tararua FP.<br>Photographer: Jeremy R. Rolfe, Date taken: 06/11/2005, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Dehisced capsule. Kerikeri River.<br>Photographer: Jeremy R. Rolfe, Date taken: 09/03/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Dehisced capsule. Kerikeri River.<br>Photographer: Jeremy R. Rolfe, Date taken: 09/03/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Remutaka Rail Trail.<br>Photographer: Jeremy R. Rolfe, Date taken: 02/12/2006, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Karakatuwhero River, East Cape.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Karakatuwhero River, East Cape.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
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Common name

mikoikoi, NZ iris

Synonyms

Renealmia grandiflora R.Br.; Libertia orbicularis Col.

Family

Iridaceae

Authority

Libertia grandiflora (R.Br.) Sweet

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Herbs - Monocots

NVS code

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.

LIBGRA

Chromosome number

2n = 114

Current conservation status

  • Conservation status of New Zealand indigenous vascular plants, 2017

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.

Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.

2017 | Not Threatened

Previous conservation statuses

2012 | Not Threatened

2009 | Not Threatened

2004 | Not Threatened

Distribution

Endemic. New Zealand: North Island (Te Paki to Wellington but seemingly absent from the Volcanic plateau)

Habitat

Coastal to montane. Usually in open, lowland forest remnants, forest margins, on steep slopes, ridgelines, bluffs, cliffs, stream banks, and river terraces.

Features

Plants consisting of leafy fans, closely bunched on short, highly branched rhizomes, joined by short stolons. Leaves 100–1400 × 2–12 mm, the two surfaces similar; leaf bases pink-green; nerves many, median ones may be crowded to sometimes form a midrib; margins often finely scabrid; leaf in transverse section convex lens-shaped, with two rows of vascular bundles present centrally, marginal vascular bundle present, sclerenchyma present on inside of leaf sheath. Inflorescences long, usually carrying flowers above leaves; peduncles also long. Panicle broad, much and openly branched, lower bracts long (40–130 mm), green and lanceolate, upper bracts narrow and pale brown, occurring singly; 1–6 flowers per branch. Pedicels slender but stiff, 10–50 mm long, glabrous. Perianth bud often pigmented externally, equal to or twice as long as ovary, flowers 10–30 mm diameter; tepals all white internally, widely patent; outer tepals < ½ of inner, narrower, oblong-elliptical, boat-shaped, with apiculus; inner tepals, unguiculate, distal portion orbicular and often overlapping outer tepals, cleft present at tips. Staminal filaments shortly connate; anthers c. 3 mm long, bright yellow. Ovary pyriform, small compared with perianth bud; style branches scarcely winged, pointing upwards. Capsule 6 –14 mm ¥ 4–8 mm, tear-drop shaped, green, turning to black on maturity, fully dehiscing by shorter or longer loculicidal splitting, the longer valves often widely recurved. Seeds c. 1.0–2.0 × 1.0–1.5 mm, rounded or sometimes angular if crowded, bright tangerine orange.

Similar taxa

The large orbicular petals, small boat-shaped sepals, and inflorescences which usually overtop the leaf tips separates L. grandiflora from all other New Zealand taxa. L. grandiflora differs from L. mooreae by leaf length, the lack of red-purple leaf bases, fully dehiscent capsules, bright orange seeds, and in cross-section by the lens-shaped leaves which have marginal vascular bundles. It differs from L. peregrinans, L. cranwelliae, and L. edgariae by the lack of elongated rhizomes, from L. ixioides by the petal and sepal shape, and the taller inflorescences, and from L. micrantha by the taller stature and much larger flowers.

Flowering

September – November

Flower colours

White, Yellow

Fruiting

December – April

Life cycle

Seeds are possibly dispersed by wind (Thorsen et al., 2009).

Propagation technique

Easily grown from fresh seed and by the division of established plants, and tolerant of a wide range of situations - except permanently water logged soils. Libertia grandiflora is an attractive plant that deserves to be more widely cultivated that it is.

Etymology

libertia: Named after Marie-Anne Libert, (1782-1865) born & died in Malmedy, province of Liège, Belgium; botanist and mycologist

grandiflora: Large flowered

Attribution

Fact sheet prepared by P.J. de Lange for NZPCN (1 June 2013)

References and further reading

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

NZPCN Fact Sheet citation

Please cite as: de Lange, P.J. (Year at time of access): Libertia grandiflora Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/libertia-grandiflora/ (Date website was queried)

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