Sophora fulvida
Poisonous plant
Common names
kōwhai
Biostatus
Native – Endemic taxon
Category
Vascular
Structural class
Trees & Shrubs - Dicotyledons
Simplified description
A kowhai tree bearing leaves to 140mm long that have equal-sized small yellowish-hairy leaflets 1.8-7.5 long and with bunches of drooping yellow flowers and dry ridged and knobbly seed pods 60-190mm long containing hard yellow seeds. Juvenile and adults similar. Occurring north of Raglan.
Flower colours
Yellow
Detailed description
A small kowhai tree to 10 m tall. It has many hairy, small, crowded, yellow-green or grey leaflets. Young branches are also hairy, and juvenile plants do not divaricate. Leaves on adults are up to 140 mm long and bear 60-90, roughly elliptical leaflets, each 1.8 to 7.5 by 1.2 to 4.5 mm. The larger juvenile leaves are almost devoid of hairs, also elliptical in shape and range in size from 2 to 3 by 4 to 6 mm. Flowers are yellow.
Similar taxa
Sophora microphylla, S. chathamica, S. godleyi and S. tetraptera could be confused with S. fulvida. These all tend to have fewer leaflets on each leaf, and leaflets which are often larger, broader, crowded and sometimes overlapping or widely spaced.
Distribution
Endemic to New Zealand, occurring in Northland, Auckland and the Waikato. The southern limit occurs at Mt Karioi on the south side of Raglan Harbour.
Habitat
Open or disturbed sites, on base-rich volcanic rock, rubble and outcrops, amongst mixed podocarp-hardwood forest.
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2022-2023 using the New Zealand Threat Classification System (NZTCS) – more information about this can be found on the NZTCS website. This report includes replaces all previous NZTCS lists for vascular plants. Previous assessments can be found here.
Please note, threat classifications are often suggested by authors when publications fall between NZTCS assessment periods – these interim threat classification statuses has not been assessed by the NZTCS panel.
- Conservation status of vascular plants in Aotearoa New Zealand, 2023. 2024. Peter J. de Lange, Jane Gosden, Shannel P. Courtney, Alexander J. Fergus, John W. Barkla, Sarah M. Beadel, Paul D. Champion, Rowan Hindmarsh-Walls, Troy Makan and Pascale Michel Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.
2023 | At Risk – Naturally Uncommon | Qualifiers: RR
Threats
Competition from weeds, especially on rocky outcrops; animal browse and loss of habitat.
Detailed taxonomy
Family
Fabaceae
Synonyms
Sophora microphylla var. fulvida Allan; Sophora microphylla subp. microphylla var. fulvida (Allan) Yakovlev
Endemic taxon
Yes
Endemic genus
No
Endemic family
No
Ecology
Flowering
Flowering occurs from October to November.
Fruiting
Fruiting in April–May.
Propagation technique
Easy from seed. The hard seed coast should be lightly nicked or sanded to expose the endosperm. Soaking seed in water overnight before sowing often improves the germination success rate. Can be grown from cuttings but these are usually very slow and hard to strike.
Other information
Cultivation
Commonly sold by commercial nurseries - usually as S. microphylla var. fulvida.
Poisonous plant
All parts of the plant but especially the ripe yellow seed are poisonous. Because the seed are hard they will take a lot of chewing to cause harm. If the seed are crushed before eating it is more likely that they will cause harm. The major toxin is Cytisine and symptoms of poisoning include nausea, vomiting, increased heart rate, twitching of muscles or loss of coordination. Onset of these symptoms may occur within one hour. In extreme cases symptoms include paralysis and respiratory failure. Click on this link for more information about Poisonous native plants.
Plant of the Month
This plant has been featured as a Plant of the Month – see Trilepidea: NZPCN newsletter for January 2012 for the full story.
Etymology
sophora: After the Arabic name for a similar tree
fulvida: Yellow
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.
SOPFUL
Chromosome number
2n = 18
Previous conservation statuses
2017 | At Risk – Naturally Uncommon | Qualifiers: RR
2012 | At Risk – Naturally Uncommon | Qualifiers: RR
2009 | At Risk – Naturally Uncommon
2004 | Gradual Decline
Referencing and citations
References and further reading
Heenan, P.B.; de Lange, P. J.; Wilton, A. D. 2001: Sophora (Fabaceae) in New Zealand: taxonomy, distribution, and biogeography. New Zealand Journal of Botany 39(1): 17-53.
Attribution
Fact Sheet prepared for NZPCN by P.J. de Lange 1 August 2003. Description based on Heenan et al. (2001).
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Sophora fulvida Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/sophora-fulvida/ (Date website was queried)