Species

Elaeocarpus hookerianus

Etymology

Elaeocarpus: olive-seed
hookerianus: 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)

pokaka

Current Conservation Status

2012 - Not Threatened

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 - Not Threatened
2004 - Not Threatened

Authority

Elaeocarpus hookerianus Raoul

Family

Elaeocarpaceae

Brief Description

Small tree with distinct small narrow glossy olive-green and brown wavy leaves to 5cm long on zig zagging interlacing branches on juvenile plants that then develop much larger adult leaves 3-11cm long by 1-3cm wide on straight erect twigs. Flowers white, lacy, drooping, in small sprays. Fruit dark purple, oval.

Flora Category

Vascular - Native

NVS Species Code

ELAHOO

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 Trees & Shrubs

Synonyms

None

Distribution

Endemic. North, South and Stewart Islands - uncommon from Auckland north.

Habitat

Common tree of lowland to montane forests.

Similar Taxa

The juvenile and sub adult form of this species is well marked, and could only be confused with the unrelated Pittosporum turneri. It can be distinguished from that by the branches being circular rather than hexagonal, and by the more diverse array of leaf shapes, and usually by the greater preponderance of linear-lanceolate, deeply lobed or serrated leaves. In its adult stage it is somewhat similar to hinau but has much smaller, uniformly darker coloured leaves, and smaller flowers and fruits.

Flowering

October - January

Flower Colours

White

Fruiting

November - March (- June)

Propagation Technique

Easy from fresh fruit - though can be slow to germinate. Moderately easy in most soils, light and moisture regimes. Although it does best in a deep, moist, well mulched soil., it is rather hardy and once established is remarkably drought tolerant. Occasionally hybridises with hinau.

Threats

Not Threatened.

Chromosome No.

2n = 30

Endemic Taxon

Yes

Endemic Genus

No

Endemic Family

No

Life Cycle and Dispersal

Fleshy drupes are dispersed by frugivory (Thorsen et al., 2009).

Where To Buy

As with hinau, pokaka is a beautifully tree which should be more widely grown. The interlacing, divaricating juvenile to sub adult growth form is quite popular with modern landscape gardeners, as such pokaka is more often sold by commercial nurseries than hinau.

   

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

This page last updated on 12 Sep 2014