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  4. Muehlenbeckia australis

Muehlenbeckia australis

Hunterville.<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>
Bartons Bush, Trentham.<br>Photographer: Jeremy R. Rolfe, Date taken: 27/06/2005, 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>
Hutt Valley.<br>Photographer: Jeremy R. Rolfe, Date taken: 10/07/2005, 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>
Coromandel, January.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Coromandel, November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Coromandel, November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Muehlenbeckia australis.<br>Photographer: Peter J. de Lange, 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>
Muehlenbeckia australis.<br>Photographer: Peter J. de Lange, 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>
Fruits, Stevensons Island.<br>Photographer: John Barkla, 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>
Fruits, Stevensons Island.<br>Photographer: John Barkla, 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>
Muehlenbeckia australis.<br>Photographer: Keir Morse, 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>
Fruit. Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 01/04/2013, 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>
Fruit. Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 01/04/2013, 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>
Staminate flower. Glenorchy.<br>Photographer: Jeremy R. Rolfe, Date taken: 12/03/2009, 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>
Juvenile leaves. Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 31/12/2017, 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>
Climbing through Coprosma robusta. Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 31/12/2017, 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>
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 31/12/2017, 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>
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 31/12/2017, 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>
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Common name

pōhuehue, large-leaved muehlenbeckia

Synonyms

Coccoloba australis G.Forst., Polygonum australe (G.Forst.) A.Rich. nom. illegit., Muehlenbeckia adpressa (Labill.) Meisn., Polygonum forsteri Endl.,

Family

Polygonaceae

Authority

Muehlenbeckia australis (G.Forst.) Meisn.

Flora category

Vascular – Native

Endemic taxon

No

Endemic genus

No

Endemic family

No

Structural class

Lianes & Related Trailing Plants - Dicotyledons

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.

MUEAUS

Chromosome number

2n = 20

Current conservation status

  • Conservation status of New Zealand indigenous vascular plants, 2017

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 | Not Threatened

Previous conservation statuses

2009 | Not Threatened

2004 | Not Threatened

Distribution

Indigenous. New Zealand - Three Kings, North, South, Stewart Islands. Also Norfolk Island. Chatham Islands plants placed here by other botanists warrant separate taxonomic recognition (see below).

Habitat

Coastal to montane - common in disturbed habitats such as shrubland, forest margins and other successional vegetation. Often found in rural and urban landscapes, Most common in coastal to lowland habitats but extending to lower montane (up to 600 m a.s.l.). A rampant and at times aggressive vine which is often regarded by people as a serious pest plant.

Features

Gynodioecious, rampant, liane forming tangles of growth up to 15 m long (or rarely more); bark dark brown, black, or grey (if exposed often covered in crustose and fruticose lichen growth), firmly attached. Main stem up to 0.1 m d.b.h., terete, much-branched, pliant, branches often tangled or interlaced, pliant, 10–20 mm diameter, terete; branchlets slender, terete, finely grooved, young growth usually glabrous, sometimes glabrescent, if so then finely pubescent, hairs, brown or black, minute, patent, caducous. Leaves alternate, membranous (wilting readily if picked), glabrous; petiole pliant, 20–25(–30) mm long, greenish, vinous-red, maroon or black; lamina of juvenile 10-30 × 5-10 mm, pandurate, subpandurate or trilobed (often on same plant), apex acute, usually sharply acuminate, acumen up to 5 mm long, base truncate, dull light green to green, with green, vinous-red or maroon margin, midrib impressed, dark green or red-green, veins reddish ± evident; lamina of adult 20-80 × 10-30(-40) mm, broad-ovate to broad-oblong, entire, often undulose, apex sharply, acutely acuminate, acumen 10-15 mm long, base truncate to subtruncate, dull light green, green, dark green, with green, vinous-red or maroon margin, midrib yellowish, slightly raised, veins usually obscure or not evident. Ochreae caduocus, hyaline, (4-)5–6 mm long. Inflorescences axillary and terminal, paniculate, usually leaf at base, panicles 100-150 × 100 mm, comprised of bracteose racemes 30-50 mm long, bracts 1.5-3.0 mm long, narrowly deltoid, hyaline, membranous, caducous. Flowers ± stellate, greenish to cream, 4-5(-6) mm diameter. Tepals free or fused near base, 5.0-6.0 × 1.5-2.0 mm, oblong, ovate, ± cucullate (♀ especially), greenish or cream (♂ especially). ♂ flowers, shortly pedicellate, pedicels 0.4-1.2 mm long, glabrous, green. Tepals 5, widely spreading, stamens 8, antisepalous, in two whorls of four, outer spreading, inner suberect to erect; filaments 5.8-6.2 mm long, cream or white, anthers basifixed, 0.3-0.5 mm, oblong, cream, gynoecium rudimentary (barren). ⚥ flowers similar but with functional gynoecium, found to varying degrees on otherwise ♂ plants. ♀ flowers, shortly pedicellate, pedicels 0.2-0.8 mm long, glabrous, green. Tepals 5, suberect, cucullate, staminodes if present 8, often heavily reduced or absent; stigmas broad, fimbriate. Fruit invested by white succulent persistent perianth. Nut 2.8-4.0 × 1.8-2.9 mm, trullate, triquetrous, asymmetric broad at base, apex subacute, angles obtuse, twisted, faces concave, smooth; surfaces dark red brown, dark brown, or brown-black.

Similar taxa

A well marked species unlikely to be confused with any other Muehlenbeckia or vine species wild in New Zealand. From the other New Zealand Muehlenbeckia, except M. complexa, it is distinguished by vine growth habit. From M. complexa var. complexa it is separated by the larger (20-80 × 10-30(-40) mm c.f. 5-20 × 2-15 mm in M. complexa var. complexa) broadly ovate to broadly oblong acuminate leaves (rather than smaller, oblong, obovate to suborbicular), larger (100-150 × 100 mm c.f. 10-40 × 5 mm in M. complexa var. complexa) heavily branched panicles (rather than simple spicate or sparingly branched spicate panicles, sometimes with inflorescences reduced clusters of 2-4 flowers in leaf axils). Muehlenbeckia complexa var. grandifolia is closer to M. australis but the branchlets are covered in dark red tomentum, and the inflorescences spicate. The Chatham Islands race of Muehlenbeckia australis is allopatric from M. australis s.s. it differs by its much larger, coriaceous glossy leaves, and other characters. It is genetically distinct from M. australis - it is currently in the process of being formally described.

Flowering

Flowering may occur throughout the year.

Flower colours

Green, White

Fruiting

Fruits may ben present throughout the year

Threats

Not Thrteatened

Etymology

muehlenbeckia: Named after a botanist named Muehlenbeck

australis: Southern

EXTRA INFORMATION

The description provided here does not include Chatham Island plants - those are probably sufficiently distinct from Muehlenbeckia australis to warrant separate taxonomic recognition.

Attribution

Fact Sheet prepared for NZPCN by P.J. de Lange 29 April 2022. Description by P.J. de lange (29 April 2022).

NZPCN Fact Sheet citation

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

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