Coprosma wallii
Synonyms
None
Family
Rubiaceae
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.
COPWAL
Chromosome number
2n = 132
Current conservation status
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 | At Risk – Declining | Qualifiers: CD, RF
Previous conservation statuses
2009 | At Risk – Declining | Qualifiers: CD, RF
2004 | Gradual Decline
Brief description
Bushy dark green shrub or small tree with orange under-bark and many very wide-angled branches bearing groups of pairs of small oval leaves and bulging purple fruit. Leaves 5-10mm long, nearly as wide as long, with a triangular hairy ridge on the fuzzy stem between leaf bases. Seeds nearly round.
Distribution
Endemic. North, South and Stewart Islands. In the North Island, rather local and with a predominantly eastern distribution from the Ripia River Headwaters to Wairarapa, with only two western populations at Erua and Paengaroa In in the South Island much more widespread in both the east and west (with new populations still being discovered mainly in the west and south). On Stewart Island, only recently (2000) discovered and still only known from one location.
Habitat
Occupies a range of habitats from seasonally flooded, alluvial forest prone to very cold winters and dry summers, to riparian forest and subalpine scrub, or as a component of grey scrub or mixed Podocarp forest developed on steeply sloping basaltic or andesitic rock. The key feature of the majority of C. wallii habitat is that the substrates are rather fertile and the vegetation is limited by frost, water logging, or severe summer drought. Never associated with broad-leaved canopy trees.
Features
Shrub to small tree (1.8-)2(-3) m. Trunk stout, clad in dark bubbly bark, under bark dark red. Branches stout, erect then spreading, somewhat pagodiform, branchlets stout, subtetragonous, densely clad in short, appressed, antrorse ruffous hairs. Petioles pubescent, c.1 mm. Seedling and juvenile leaves, rhomboid to ovate-oblong, densely clad in long, dark, rufous appressed hairs. Adult leaves leathery, glabrous, 5-9 x 5-7 mm, broad-ovate to suborbicular, broadly ovate-oblong, obtuse, subtruncate at base, dark green to green, upper surface very shiny, veins not evident, under sides paler, midrib and secondary veins evident. Flowers 1(-2-3) on short branchlets. Male without calyx, corolla short, broadly campanulate, lobes broad-ovate, acute. Female corolla funnelform, lobes triangular, acute, Drupe ovoid, didymous, 3 x 4.5 mm, dark violet black to black.
Similar taxa
Easily recognised through a combination of its tall shrub to small tree habit, dark red under bark, leafy branches bearing numerous rather dark green, shiny, small leaves, and by the dark violet-black strongly twinned (didymous) fruits.
Flowering
No information
Fruiting
Fruit may be present throughout the year. However, they are most conspicuous between March and May
Life cycle
Fleshy drupes are dispersed by frugivory (Thorsen et al., 2009).
Propagation technique
Easy from fresh seed. Can be grown from semi-hardwood cuttings. Quite fast growing, doing best in fertile, moist alluvial soils but once established remarkably tolerant of a wide variety of soils and moisture regimes.
Threats
Although not as threatened as once believed, several North and South Island populations are in vulnerable habitats or persist as remnant stands within rough pasture and/or along roadsides. In these sites recruitment is limiting or absent. Weeds remain a long term threat at virtually all known habitats. As a somewhat cryptic plant it is also vulnerable through the failure to recognise it. Some populations on track sides and near popular scenic attractions have been damaged by track maintence and in one site the erection of a toilet block.
Etymology
coprosma: From the Greek kopros ‘dung’ and osme ‘smell’, referring to the foul smell of the species, literally ‘dung smell’
Where To Buy
Not commercially available.
Attribution
Fact Sheet prepared for NZPCN by P.J. de Lange 1 August 2003. Description based on Allan (1961).
References and further reading
Allan, H.H. 1961: Flora of New Zealand. Vol. I. Wellington, Government Printer
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
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Coprosma wallii Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/coprosma-wallii/ (Date website was queried)