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  4. Geranium microphyllum

Geranium microphyllum

Geranium microphyllum, Campbell Island.<br>Photographer: John Barkla, Date taken: 11/02/2014, 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>
Geranium microphyllum flower, Campbell Island.<br>Photographer: John Barkla, Date taken: 11/02/2014, 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>
Falla Peninsula, Auckland Island.<br>Photographer: Rowan Hindmarsh-Walls, Date taken: 21/01/2020, 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>
Falla Peninsula, Auckland Island.<br>Photographer: Rowan Hindmarsh-Walls, Date taken: 19/01/2020, 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>
Falla Peninsula, Auckland Island.<br>Photographer: Rowan Hindmarsh-Walls, Date taken: 19/01/2020, 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>
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Synonyms

None.

Family

Geraniaceae

Authority

Geranium microphyllum Hook.f.

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Herbs - Dicotyledons other than Composites

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.

GERMIC

Chromosome number

2n = 52-56

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 | At Risk – Naturally Uncommon | Qualifiers: RR

Previous conservation statuses

2009 | At Risk – Naturally Uncommon

2004 | Data Deficient

Distribution

Endemic to the Auckland and Campbell Islands.

Habitat

A species of sub Antarctic herbfields and turfs.

Features

Perennial herb arising from a stout, thick somewhat woody taproot. All parts covered in soft backward or forward projecting appressed hairs. Stems slender, prostrate, with few to many branches. Basal leaves not persistent for duration of growing season, Leaf stalks (petioles) up to 17 cm long, leaf 4 cm diameter, kidney-shaped to circular or broadly ovate, deeply lobed, almost to midrib, sometimes more shallowly divided. Lobes 3-5, narrow to broadly obovate or oblong, apex rounded or shortly spine-tipped (mucronate). Stem leaves smaller, with fewer lobes. Flower stalks (peduncles) 1-6(-9) cm long. Flowers 1-2. Sepals 3-5(-6) × 0.8-2(-2.5) mm, lanceolate or elliptic-oblong, purple or with a purple marginal line. Petals white, (4-)6(-9) × 2.5-4.5 mm, broadly obovate. Seed 1.5-1.9 mm long, oblong.

Similar taxa

Geranium microphyllum s.s. is the only Geranium species found on the sub Antarctic islands, so it is unlikely to be confused with any other species in the field. Other mainland plants referred to this species are believed to be examples of one or more distinct, and possibly unnamed species (B.P.J. Molloy pers. comm.).

Flowering

October - February

Flower colours

White

Fruiting

No information available

Life cycle

Seed dispersed by wind, ballistic projection and possibly attachment (Thorsen et al., 2009).

Propagation technique

Easily grown from seed. Plants are short-lived but readily set seed.

Threats

Geranium microphyllum s.s. is only known from the sub Antarctic islands. It is rarely collected.

Etymology

geranium: From the Greek geranos ‘crane’, the fruit of the plant resembling the head and beak of this bird, hence the common name cranesbill.

microphyllum: Small leaf

Where To Buy

Not commercially available.

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): Geranium microphyllum Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/geranium-microphyllum/ (Date website was queried)

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