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  4. Drosera auriculata

Drosera auriculata

Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 15 October 2005, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Drosera auriculata.<br>Photographer: Wayne Bennett, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 16 October 2004, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 12 August 2001, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Coromandel, October.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Upper Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 22 October 2005, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Glabrous sepals are diagnostic. Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 20 November 2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Parahaki, Whangarei. Oct 2011.<br>Photographer: Lisa Forester, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-sa/4.0'>CC BY-SA</a>.
Cranefly caught by sundew. Tararua Forest Park.<br>Photographer: Jeremy R. Rolfe, Date taken: 20 November 2011, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 25 December 2011, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Spirits Bay, Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 November 2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Spirits Bay, Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 November 2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Spirits Bay, Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 November 2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 13 September 2020, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 13 September 2020, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
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Common name

sundew

Synonyms

Drosera circinervia Colenso, D. stylosa Colenso, Drosera peltata subsp. auriculata ( Planch. ) B.J.Conn

Family

Droseraceae

Authority

Drosera auriculata Planch.

Flora category

Vascular – Native

Endemic taxon

No

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.

DROAUR

Chromosome number

2n = 32

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. North and South Islands to about south Canterbury, northern Otago and south Westland/ Present in Australia

Habitat

Coastal to montane, on recently exposed and naturally open ground, clay pans, in low scrub, on lava. Often abundant following fire.

Features

Tuberous herb. Plants usually olive-green in exposed locations, rarely richly maroon; tuber ovoid to globose, up to 10 × 8 mm; surface white to red, often in a papery sheath; vertical stolon 20–80 mm long. Stem erect, usually simple, sometimes shortly branched, 90–600 mm long, glabrous. Leaves often in a flat basal rosette and cauline; basal leaves 4–19, the lamina ovate, elliptic, orbicular or reniform, 1.8–3.5 × 2–6 mm wide on a linear petiole 5.0–17.0 × 1.2 mm wide; 9–36 cauline leaves alternate, the lamina crescentic, 1.5–5.5 × 2.0–5.5 mm, with acute angles, on petiole 3–23 mm long. Inflorescence a 1-sided raceme 2–14-flowered; peduncle usually 6–50 mm long, but up to 80 mm; pedicels 1–14 mm long. Sepals 2.0–6.0 × 0.9–2.6 mm, ovate, elliptic and rarely obovate, glabrous with an entire to irregularly serrulate margin. Petals 3.0–10.0 × 1.5–5 mm, white or pink, obovate, cuneate, apex emarginate, sometimes obtuse and rarely truncate. Styles 3, 0.6–1.4 mm long, divided into a total of c.15–30 cylindrical segments. Seeds 0.8–1.6 mm long, cylindrical with a shallowly reticulated surface.

Similar taxa

Drosera auriculata could only be confused only with D. hookeri, with which it often grows in Northland and from which it differs by the glabrous rather than hairy sepals and cylindrical rather than ovoid to arachniform (i.e. peanut-shaped) shallowly reticulated seeds (rather than deeply pitted seeds) which are > 1 mm long, rather than 0.5-8.0 mm long. Sometimes the seeds of Drosera hookeri can be cylindrical, and so a little like those of D. auriculata, but in these cases they can be distinguished from D. auriculata by their smaller size and deeply pitted testa.

Flowering

September - February

Flower colours

Red/Pink, Violet/Purple

Fruiting

October - April

Propagation technique

Can be grown in pots from seed or from the small overwintering bulbils. Quite easily grown in this way. In suitable conditions it can naturalise itself.

Etymology

drosera: Dewy

auriculata: Small-eared


Where To Buy

Not commercially available.

Attribution

Fact sheet prepared for NZPCN by P.J. de Lange (22 March 2012). Description adapted from Gibson et al. (2012).

References and further reading

Gibson, R.; Conn, B.J.; Bruhl, J.J. 2012: Morphological evaluation of the Drosera peltata complex (Droseraceae). Australian Systematic Botany 25: 49-80.

Citation

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

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