Pittosporum ellipticum
Synonyms
Pittosporum ellipticum Kirk subsp. ellipticum, Pittosporum ellipticum var. decorum Cheeseman, Pittosporum ellipticum subsp. ovatum Kirk, Pittosporum ellipticum var. ovatum (Kirk) Kirk
Family
Pittosporaceae
Flora category
Vascular – Native
Endemic taxon
Yes
Endemic genus
No
Endemic family
No
Structural class
Trees & Shrubs - Dicotyledons
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.
PITELL
Chromosome number
2n = 24
Current conservation status
The threat classification 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) – more information about this can be found on the NZTCS website 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. Please note, threat classifications are often suggested by authors when publications fall between NZTCS assessment periods – a suggested threat classification status has not been assessed by the NZTCS panel.
Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.
2017 | At Risk – Naturally Uncommon | Qualifiers: Sp
Previous conservation statuses
2012 | At Risk – Naturally Uncommon | Qualifiers: Sp
2009 | At Risk – Naturally Uncommon
2004 | Sparse
Brief description
Small tree with fuzzy brownish new growth and oval leaves that are paler underneath and with hard capsules that split into two to show the black sticky seed inhabiting the upper North Island. Leaves 5-10cm long, often with some brown fuzz underneath. Capsules also brown fuzzy.
Distribution
Endemic. North Island from Te Paki to Mt Pirongia in the west and about the Karangahake and Waioeka Gorges in the East.
Habitat
Most often associated with kauri (Agathis australis) forest, where it often grows on ridge lines, slips scars or in secondary regrowth within cut over kauri forest. Outside this forest association it is often found as part of the understory in tanekaha (Phyllocladus trichomanoides), towai (Pterophylla sylvicola) or kamahi (P. racemosa) dominated forest. Occasionally it can be found growing along flood prone streams and rivers. Irrespective of the vegetation associations it grows in this species prefers relatively open sites, especially along track and roadsides where it typically forms apparently evenly-aged cohorts that probably stem from a single germination event following disturbance.
Features
Small gynodioecious tree up to 8 m tall but usually less. Trunk and branches dark brown, young branchlets clad in fine, appressed rust-coloured tomentum. Leaves alternate, crowded at tips of branches. Petioles 4-15 x 1.5-2 mm, densely invested in appressed, rust-coloured tomentum. Lamina 30-97 x 15-50 mm, yellow-green to dark green above, pale red-green or reddish-yellow beneath, elliptic-oblong, ovate or obovate, apex and base acute or obtuse, margin entire; emergent and expanding leaves densely invested in appressed, rust-coloured tomentum, soon becoming glabrate above and sparsely tometnose to glabrate beneath, coriaceous. Flowers in terminal 2-6-flowered fascicles; pedicels 5-14 mm, accrescent in fruit, rusty orange to rust-grey tomentose, subtended by several caducous, rusty-tomentose 1-2 mm long bud scales. Sepals linear, acuminate, 8-11 x 2-2.7 mm, rusty-tomentose, ciliate; petals 14-19.5 x 3-3.5 mm, oblanceolate-linear, subacute, recuvred at tips, reddish-brown, chocolate or dark golden yellow; stamens 7-11 mm, anthers 1-3 mm. Ovary 2.5-7.5 x 1.5-4.5 mm, invested in rust-coloured hairs, style 1.5-6.5 mm long, stigma capitate or tuncate. Capsules, woody, subglobose, 3 or 2-valved, 15-20 x 13-17 mm, covered in rust-borwn to rust-grey tomentum. Mucilage yellow-red to orange. Seeds 25-36 (with many aborted), reddish-back, somewhat irregular in outline.
Similar taxa
Most similar to Pittosporum huttonianum from which it is differs by the rust-coloured (rather than grey to grey-white) tomentum on the emergent leaves and leaf undersides.
Flowering
July - October
Flower colours
Brown, Red/Pink
Fruiting
August - January (though fruit is long persistent and may be seen year round)
Propagation technique
Difficult. Seed may take up to five years to germinate and germination is often poor. Best grown from semi-hardwood cuttings, though even these can be hard to strike. Although an attractive small tree it is often hard to maintain in cultivation, and is prone to sudden collapse in times of stress. This is a shame because the red, orange and yellow-flowered forms are very beautiful.
Threats
Not directly threatened though it is generally very uncommon throughout its range, and where found it is often known from one or two trees. However, there are exceptions, for example the species is common along the ridge lines of Mt Manaia, Bream Head and in the Waitakere Ranges (especially near Anawhata and Destruction Gully).
Etymology
pittosporum: Pitch seed
ellipticum: Elliptic
Taxonomic Notes
In its typical form this is a well marked and very distinctive species. However around the Karangahake Gorge and south of there to the Waioeka Gorge plants referrable to Cheeseman’s Pittosporum ellipticum var. decorum occur. These are rather intermediate with P. huttonianum . Critical study using molecular markers is needed to resolve this problem.
Attribution
Fact sheet prepared for NZPCN by P.J. de Lange 30 August 2006. Description adapted from Cooper (1956).
References and further reading
Cooper, R.C. 1956: The Australian and New Zealand species of Pittosporum. Annals of the Missouri Botanical Garden 43: 87-188
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Pittosporum ellipticum Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/pittosporum-ellipticum/ (Date website was queried)