Classification
Class
Magnoliopsida Brongn.
Order
Ranunculales Juss. ex Bercht. & J.Presl
Family
Ranunculaceae
Genus
Ranunculus L.
 Nomenclature
Scientific Name:
Ranunculus macropus Hook.f., Icon. Pl. 7, 634 (1844)
Synonymy:
  • = Ranunculus longipetiolatus Colenso, Trans. & Proc. New Zealand Inst. 25: 325 (1892 [1893])
Vernacular Name(s):
Raoriki; Swamp buttercup; Waoriki
 Description

Perennial; rosettes tufted on long creeping stems. Basal lvs on stout erect petioles (7)–15–30–(40) cm long, arising from somewhat bulbous nodes; lamina ternate, glabrous, (1.5)–2–4 cm wide; leaflets sessile or shortly stalked, cuneiform, shallowly 3-fid, crenate or bluntly dentate at tips; lateral leaflets longer than terminal; cauline lvs few, similar to basal but smaller. Fls (1)–3–5 per stem, 10–15 mm diam.; pedicels glabrous. Sepals spreading or weakly recurved, glabrous. Petals 5–7, yellow, narrowly oblong, shortly clawed; nectary single, 1–1.5 mm from petal base, with a short semilunar scale. Receptacle with a basal collar of bristles. Achenes 15–50, hardly flattened, glabrous; body 1.5–2 mm long, slightly rugulose; beak straight, 1–1.5 mm long.

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

 Biostatus
Indigenous (Endemic)
 Bibliography
Colenso, W. 1893: Phænogams: A description of some newly-discovered Indigenous plants; being a further contribution towards the making known the botany of New Zealand. Transactions and Proceedings of the New Zealand Institute 25: 324–338.
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. [Data deficient]
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. [Data Deficient]
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. [Data Deficient]
Garnock-Jones, P.J. 1990: Typification of Ranunculus names in New Zealand. New Zealand Journal of Botany 28: 115–123.
Hooker, W.J. 1844: Icones Plantarum. Vol. 7. Hippolyte Baillière, London.