Species

Drosera hookeri

Etymology

Drosera: dewy
hookeri: Named after Sir Joseph Dalton Hooker (born 1817) - a world famous botanist who travelled on the Antarctic expedition of 1839 under the command of Sir James Ross and wrote "Handbook of New Zealand Flora" published in 1864-67 describing many specimens sent to Kew by collectors. He died in 1911 and has a memorial stone at Westminster Abbey London.

Common Name(s)

sundew

Current Conservation Status

2012 - Non Resident Native - Coloniser

Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB

Previous Conservation Status

2009 - Non Resident Native - Coloniser
2004 - Not Threatened

Qualifiers

2012 - EF, SO
2009 - SO, DP, EF

Authority

Drosera hookeri R.P.Gibson, B.J.Conn et Conran

Family

Droseraceae

Flora Category

Vascular - Native

NVS Species Code

DROHOO

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.

Structural Class

Dicotyledonous Herbs other than Composites

Synonyms

Drosera foliosa Hook.f. ex Planch. nom. illegit.; Drosera peltata var. foliosa ( Planch. ) Benth., Drosera peltata var. genuina Planch., Drosera peltata var. gracilis ( Planch. ) Benth.; Drosera peltata var. gunniana Planch.; Drosera peltata Thunb. auct. Salmon (2011)

Distribution

Indigenous. North Island from Te Paki south to about Auckland. Also Australia (south-eastern Australia and eastern Tasmania).

Habitat

Coastal to lowland on consolidated sand dunes, on clay pans, sometimes on peat. Usually in low gum land scrub and adjacent shrub lands. Often common after fires, and favours frequently disturbed ground.

Features

Tuberous herb, often bright yellow-green in colour (rarely reddish to maroon); tuber ovoid, up to 5 × 5 mm tall; surface white to red, often in a papery sheath; vertical stolon 10–40 mm long. Above ground parts of the plants highly variable in height, with glabrous stems between 25 × 380 mm tall; unbranched or branched apically, distally, or both. Leaves, often in a flat basal rosette and cauline; basal leaves 2–22, the lamina ovate, elliptic, flabellate, reniform to hatchet-shaped, 1–5 × 2–11mm on a linear petiole 3.0–17.0 × 1.8 mm; cauline leaves alternate, the lamina crescentic, 1.0–6.5 × 1–10 mm, with acute angles, on petiole 3–17 mm long. Inflorescence a 1-sided raceme, 1–10-flowered; peduncle usually 10–50 mm long, but can be as short as 0.1 mm; pedicels 0.5–15 mm long. Sepals ovate, elliptic or obovate, 2.0–5.0 × 0.7–2.4 mm, usually moderately to densely hairy (with up to 30 hairs per mm square), but can also be glabrous; always with a fimbriate margin with hairs up to 1.3mm long. Petals obovate to cuneate, 3–7mm long by 2–7mm wide, white or pink. Styles 3, 0.3–1.2 mm long, divided into a total of between c.20-30 segments. Seeds 0.5–0.8 × 0.3 mm, cylindrical, pandurate to obovoid with a deeply pitted surface.

Similar Taxa

New Zealand plants have previously been treated as Drosera peltata (Salmon 2001), however, Gibson et al. (2010) showed that D. peltata is endemic to eastern Australia, and New Zealand plants referred to that species are D. hookeri. In New Zealand, D. hookeri could be confused only with D. auriculata, with which it often grows and from which it differs by the hairy rather than glabrous sepals and usually ovoid to arachniform (i.e. peanut-shaped) deeply pitted seeds (these 0.5-8.0 mm long rather than > 1 mm long). Sometimes the seeds of Drosera hookeri are cylindrical, like those of D. auriculata, but they are smaller than the seeds of D. auriculata.

Flowering

September - November

Flower Colours

White

Fruiting

November - February

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.

Threats

Drosera hookeri was first recorded for New Zealand as D. peltata (Salmon 2001) when it was recognised from various swamps and gum land scrub Northland. Although it is not clear when this species first arrived in New Zealand, it has been widely collected since it was first drawn to the attention of botanists, and it is evidently now well established throughout Northland. It is now known as far south as the northern Manukau Harbour. Drosera hookeri (as D. peltata) is currently listed as a "Coloniser" (de Lange et al. 2009) but, despite that status, it does not appear to be under any threat. In parts of its Northland range D. hookeri is now more common than D. auriculata.

Chromosome No.

2n = 32

Endemic Taxon

No

Endemic Genus

No

Endemic Family

No

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. (2010) and Gibson et al. (2012).

References and further reading

de Lange, P.J.; Norton, D.A.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Hitchmough, R.; Townsend, A.J. 2009: Threatened and uncommon plants of New Zealand (2008 revision). New Zealand Journal of Botany 47: 61-96.

Gibson, R.P.; Conn,B.J.; Conran, J.G. 2010: Drosera hookeri R.P.Gibson, B.J. Conn & Conran, a replacement name for Drosera foliosa Hook.f. ex Planch. nom. illeg. (Droseraceae). Journal of the Adelaide Botanic Gardens 24: 39–42.

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

Salmon, B. 2001: Carnivorous Plants of New Zealand. Ecosphere Publications: Auckland.

This page last updated on 11 Aug 2014