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  4. Anisotome patula

Anisotome patula

In cultivation.<br>Photographer: Geoff Davidson, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
In cultivation.<br>Photographer: Geoff Davidson, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
In cultivation.<br>Photographer: Geoff Davidson, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
In cultivation.<br>Photographer: Geoff Davidson, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
In cultivation.<br>Photographer: Geoff Davidson, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
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Biostatus

Native – Endemic taxon

Category

Vascular

Structural class

Herbs - Dicotyledons other than Composites

Detailed description

Tap-rooted, perennial, grey-green herb forming lax rosettes. Tap-root branching near ground level into (1-)3(-8) vegetative shoots. Leaves 3-8 per rosette, up to 200 mm long, rather lax, rarely suberect, pinnatifid, fleshy, grey-green to yellow-green. Petiole 50-100 mm, sheath with marginal wings, brown to brown-grey, chartaceous near apex. Leaflets 3-10 pairs, distant, sessile, 5-20 x 2-5 mm, rather variable, linear, cuneiform, deltoid to flabellate, pinnatifid, pinnatisect to deeply toothed; terminal leaflets tripartite. Cauline leaves, sparse, reduced in size, grey-green leaflets 2(-5), linear, pinnatisect or deeply toothed 1-3 times. Stems (1-)3(-8) suberect to decumbent and rather lax, 100-250 mm long. Inflorescence a lax, compound umbel. Peduncles (1-)3(-5) with 1-3 simple umbels, these subtended by 1-2 primary, narrow linear, 2-8 mm long, acuminate bracts. Flowers white, petals 0.2-0.5 x 0.2-0.5 mm, ovate, elliptic. Mericarps 2.5-3 x 0.5-1 mm, narrowly ellipsoid grey-brown.

Similar taxa

Anisotome patula has been included within Gingidia enysii (Kirk) J.W.Dawson. From that species it can be distinguished by its rather lax basal leaves whose leaflets though rather variable are usually much longer, narrower, more deeply divided and/or distinctly flabellate. The inflorescences are borne on very long, flaccid stems, and in turn the umbels are support by very long, flaccid peduncles. Some intermediate forms do exist and these require further study.

Distribution

Endemic. South Island, South Canterbury where it is known from a few populations at Pareora, Manahune, and Tengawai. However, the exact distribution and status of this species is still unclear (B.P.J. Molloy pers. comm.).

Habitat

Confined to limestone where it grows in crevices, joints and on the associated deeply weathered rendzina soils. Prefers open sites within little if any associated vegetation cover.

Current conservation status

The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2022-2023 using the New Zealand Threat Classification System (NZTCS) – more information about this can be found on the NZTCS website. This report includes replaces all previous NZTCS lists for vascular plants. Previous assessments can be found here.

  • Conservation status of vascular plants in Aotearoa New Zealand, 2023. 2024. Peter J. de Lange, Jane Gosden, Shannel P. Courtney, Alexander J. Fergus, John W. Barkla, Sarah M. Beadel, Paul D. Champion, Rowan Hindmarsh-Walls, Troy Makan and Pascale Michel Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.

2023 | Threatened – Nationally Critical | Qualifiers: RR

Jump to previous conservation statuses

Threats

Under severe threat from the spread of Hieraceum pilosella L. and pasture grasses, habitat loss due to changes in stocking regimes, and through browsing from feral goats. Limestone quarrying is a long-term threat, while the very small populations are vulnerable to erosion, boulder and rock falls and erosion

Detailed taxonomy

Family

Apiaceae

Authority

Anisotome patula (Kirk) Cockayne

Synonyms

Ligusticum patulum Kirk

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Ecology

Flowering

December - April

Fruiting

December - April

Propagation technique

Can be grown from fresh seed. Does best when planted in a free draining soil enriched with lime. Excellent in a pot. Prone to powdery mildew in humid climates.

Other information

Etymology

anisotome: Unequal sided

patula: Spreading

Chromosome number

2n = 22

Previous conservation statuses

The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2022-2023 using the New Zealand Threat Classification System (NZTCS) – more information about this can be found on the NZTCS website. This report includes replaces all previous NZTCS lists for vascular plants. Previous assessments can be found here.

  • Conservation status of vascular plants in Aotearoa New Zealand, 2023. 2024. Peter J. de Lange, Jane Gosden, Shannel P. Courtney, Alexander J. Fergus, John W. Barkla, Sarah M. Beadel, Paul D. Champion, Rowan Hindmarsh-Walls, Troy Makan and Pascale Michel Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.

2017 | At Risk – Declining | Qualifiers: CD, DP

2012 | At Risk – Declining | Qualifiers: DP

2009 | At Risk – Declining | Qualifiers: DP

2004 | Not Threatened

Jump to current conservation status

Referencing and citations

Attribution

Fact Sheet prepared by P.J. de Lange (28 August 2004). Description from fresh plants and herbarium specimens.

NZPCN Fact Sheet citation

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

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