Senecio repangae subsp. pokohinuensis
Vascular – Native
Dicotyledonous Herbs - Composites
2n = 100
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 – Naturally Uncommon | Qualifiers: IE, Sp
Previous conservation statuses
2009 | At Risk – Naturally Uncommon | Qualifiers: OL, EF, IE
2004 | Range Restricted
Endemic to the Mokohinau Islands, in the north eastern Hauraki Gulf, North Island, New Zealand
A species usually associated with sites of active sea bird nesting or roosting. It is often associated with the burrows of diving petrels, grey-faced petrels and storm petrels. On Pokohinu (Burgess) Island it also extends into former pasture, and is present as a weed in the remnants of the old light house settlement. In forested areas within sites of recent wind-throw it is often found as an early colonist.
Erect, sparingly branched annual to short-lived perennial herb 0.2-1.2 m tall, arising from a stout woody rootstock. Foliage dull glaucous green. Leaves sparsely pilose hairy on undersides only otherwise glabrous; basal leaves cuneately narrowed or shortly petiolate, broadly elliptic-oval or rhomboidal, coarsely toothed, rarely lyrate-pinnatifid. Mid cauline leaves amplexicaul, usually deeply bifid at base, narrow, ovate, elliptic, lanceolate or oblong, pinnately lobed 1-2-pinnatifid with segments lanceolate to oblong, entire or few-toothed, gradually diminishing in size up stem, becoming apetiolate. Uppermost leaves smaller, lanceolate, dentate or pinnatifid. Supplementary bracts 5-9, narrow, 2-5 mm long; lower most usually dentate; margins often slightly villous, apex villous. Capitulum cylindric; involucral bracts 12-20, narrowly lanceolate, 6-9 mm long, glabrescent, with purple-black villous apices. Ray florets 8-14, evenly spaced; ligules 3-6 mm, sulphur yellow; margin involute; apex recurved, incised 3-4 times. Disc yellow 4-5 mm diameter. Cypsela subcylindric, 2.5-3 mm long, grey, slightly narrowed at apex, covered in hairs, but hairs distinctly denser toward apices and between ribs.
Senecio repangae de Lange et B.G.Murray subsp. repangae is similar and differs mainly by its dark green, heavily pilose-hairy foliage, longer capitula bracts, and ray florets which are involute, recurved, deeply incised, and widely and irregularly spaced. Senecio repangae had previously been included with S. lautus, from which it differs in its sparingly branched, erect growth form, non-succulent pilose- hairy foliage, greater number of involucral bracts (9-20 cf 11-13), longer racts (6-14 mm cf 4-7 mm), shorter ligules (1-4 mm cf 5-9 mm) and grey, subcylindric rather than black, narrowly cylindric cypsela. Senecio repangae has 2n = 100 chromosomes and S. lautus 2n = 40.
Throughout the year
Throughout the year
Easy from fresh seed. Prefers full sun. Can become invasive.
A narrow range endemic confined wholly to the Mokohinau Islands group
senecio: From the Latin senex ‘old man’ (probably referring to the bearded seeds)
Where To Buy
Not commercially available. Some plants are held by the Auckland Regional Council Botanic Gardens, Manurewa
Fact Sheet prepared for NZPCN by P.J. de Lange 1 November 2008. Description based on de Lange & Murray (1998).
References and further reading
de Lange, P.J.; Murray, B. G. 1998: Senecio repangae (Asteraceae): a new endemic species from the north-eastern North Island, New Zealand. New Zealand Journal of Botany 36(4): 509-519
Please cite as: de Lange, P.J. (Year at time of access): Senecio repangae subsp. pokohinuensis Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/senecio-repangae-subsp-pokohinuensis/ (Date website was queried)