Classification
Class
Magnoliopsida Brongn.
Order
Brassicales Bromhead
Family
Cruciferae
Genus
Rorippa Scop.
 Nomenclature
Scientific Name:
Rorippa palustris (L.) Besser, Enum. Pl. [Besser] 27 (1822)
Synonymy:
  • ≡ Sisymbrium amphibium var. palustre L.
  • = Sisymbrium islandicum Oeder, Fl. Dan. 3, t. 409 (1768)
  • ≡ Rorippa islandica (Oeder) Borbás (1900)
  • = Nasturtium palustre DC., Prodr. [A. P. de Candolle] 2, 191 (1821)
  • = Nasturtium sylvestre A.Rich., Essai Fl. Nouv.-Zél., 309 (1832)
Vernacular Name(s):
Hānea; Kōwhitiwhiti; Marsh yellow cress; Panapana; Poniu
 Description

Perennial, rarely annual, taprooted herb. Stems erect, rarely decumbent, glabrous or hairy, (3)–20–40–(100) cm tall. Lvs glabrous or hairy; margins toothed. Rosette lvs petiolate, auriculate at base, deeply pinnatifid to pinnate, (2)–4–7–(10) × 1–3 cm. Stem lvs similar to rosette lvs, auriculate at base, becoming smaller with narrower lobes above, the uppermost sometimes simple. Pedicels glabrous or sparsely hispid, erecto-patent at flowering, spreading at fruiting, (2)–4–7 mm long. Sepals 1.5–2–(2.5) mm long. Petals yellow, = sepals. Silicle glabrous, oblong to elliptic, curved, (2)–4–7 × 2–3 mm; valves not veined; style 0.5–1 mm long. Seeds pale brown, c. 0.8 mm long, finely colliculate, in 2 rows per locule.

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

 Biostatus
Indigenous (Non-endemic)
 Phenology

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

 Bibliography
Besser, W.S.J.G. von 1822: Enumeratio Plantarum hucusque in Volhynia, Podolia, gub. Kiioviensi, Bessarabiia Cis-Tyraica et Circa Odessam Collectarum, Simul cum Observationibus in Primitas Florae Galiciae Austriacae. Wilna.
de Candolle, A.P. 1825: Prodromus Systematis Naturalis Regni Vegetabilis. Vol. 2. Treuttel et Würtz, Paris.
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. [Not Threatened]
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. [Not Threatened]
Kirk,T. 1899: The Students' Flora of New Zealand and the Outlying Islands. Government Printer, Wellington, N.Z. [as Nasturtium palustre DC.; Nasturtium sylvestre A.Rich.]
Oeder, G. C. E. von Oldenburg (ed.) 1768–1770: [Flora Danica] Icones Plantarum ... Florae Danicae Nomine Inscriptum. Vol. 3. Copenhagen.
Richard, A. 1832: Essai d'une Flore de la Nouvelle Zélande. In: Dumont d'Urville, J. Voyage de découvertes de l'Astrolabe. Botanique. Tastu, Paris.