Classification
Class
Magnoliopsida Brongn.
Order
Brassicales Bromhead
Family
Cruciferae
Genus
Rorippa Scop.
 Nomenclature
Scientific Name:
Rorippa divaricata (Hook.f.) Garn.-Jones & Jonsell, New Zealand J. Bot. 26: 479 (1988)
Synonymy:
  • ≡ Cardamine divaricata Hook.f., Bot. Antarct. Voy. II. (Fl. Nov.-Zel.) Part I, 13 (1852)
  • = Rorippa stylosa (DC.) Allan, Fl. New Zealand 1, 188 (1961) nom. illeg.
Vernacular Name(s):
Matangoa
 Description

Glabrous perennial taprooted herb. Stems erect, to 1 m tall. Lf margins shallowly dentate. Lower lvs petiolate; petiole winged and expanded into deflexed amplexicaul lobes at base; lamina pinnatifid, (6)–10–16 × (2)–3–7 cm. Upper lvs smaller, linear to lanceolate, simple, cuneately narrowed to expanded amplexicaul base. Pedicels erecto-patent at flowering, spreading at fruiting, 5–12 mm long. Sepals 2–3 mm long. Petals white, c. = sepals. Siliques patent, linear, ± terete, 15–30 × 1–1.5 mm; valves with a weak median vein, or veins 0; style c. 2 mm long. Seeds reddish brown, c. 1 mm long, coarsely reticulate, in 1 row per locule.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]

 Biostatus
Indigenous (Endemic)
 Phenology

Flowering: (Oct.)–Dec.–Jan.–(Feb.); Fruiting: (Oct.)–Jan.–Feb.–(May)

 Bibliography
de Lange, P.J.; Norton, D.A.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Hitchmough, R.; Townsend, A.J. 2009: Threatened and uncommon plants of New Zealand (2008 revision). New Zealand Journal of Botany 47: 61–96. [Nationally Vulnerable]
de Lange, P.J.; Norton, D.A.; Heenan, P.B.; Courtney, S.P.; Molloy, B.P.J.; Ogle, C.C.; Rance, B.D. 2004: Threatened and uncommon plants of New Zealand. New Zealand Journal of Botany 42(1): 45–76.
de Lange, P.J.; Rolfe, J.R.; Barkla J.W.; Courtney, S.P.; Champion, P.D.; Perrie, L.R.; Beadel, S.N.; Ford, K.A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P.B.; Ladley, K. 2018: Conservation status of New Zealand indigenous vascular plants, 2017. New Zealand Threat Classification Series. No. 22. [Nationally Vulnerable]
de Lange, P.J.; Rolfe, J.R.; Champion, P.D.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Norton, D.A.; Hitchmough, R.A. 2013: Conservation status of New Zealand indigenous vascular plants, 2012. New Zealand Threat Classification Series 3. Department of Conservation, Wellington. [Nationally Vulnerable]
Garnock-Jones, P.J.; Jonsell, B. 1988: Rorippa divaricata (Brassicaceae): a new combination. New Zealand Journal of Botany 26: 479–480.
Hooker, J.D. 1852–1853 ("1853"): The Botany of the Antarctic Voyage of H.M. Discovery Ships Erebus and Terror in the Years 1839–1843, under the command of Captain Sir James Clark Ross. II. Flora Novae-Zelandiae. Part I. Flowering plants. Lovell Reeve, London.
Kirk,T. 1899: The Students' Flora of New Zealand and the Outlying Islands. Government Printer, Wellington, N.Z. [as Cardamine divaricata Hook.f.]