Ranunculus pinguis var. pilosus Hook.f., Ranunculus pinguis var. rhombifolius Hook.f.
Vascular – Native
Herbs - Dicotyledons other than Composites
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.
2n = 48
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: RR
Previous conservation statuses
2009 | At Risk – Naturally Uncommon
2004 | Range Restricted
Endemic. Auckland and Campbell Islands.
From sea level to 600 m a.s.l. Growing in damp to flooded ground within grassland and in rocky fell field and moors.
Short, stout and rather fleshy perennial rosette forming herb 50-250 mm high, all parts glabrous or sparsely pilose hairy. Thizome fleshy 7-12 mm diam., bearing many fleshy white roots. Leaves on stout fleshy petioles 20-100 mm long, with very broad, stout, fleshy sheathing bases; lamina 20-80 mm diam., dark green, reniform, deeply lobed, with lobes also crenate. Flowering scape 1-3, usually 1-flowered, unbranched, as long or longer than leaves, stout, naked or with 1-2 small linear bracts above middle. Flowers 20-30 mm diam., sepals 5-6, oblong; petals 6-10, pale yellow, narrow-obovate or linear-oblong, small and stiff, hardly as long as sepals, glossy portion reduced, with single or occasionally multiple nectaries at base; receptacle broadly oblong. Achenes numerous, small, glabrous or with short scattered hairs in upper part of body and lower part of beak; body obovate-oblong or elliptic oblong 1.4-2.0 mm long, pale brown, orange or dark red-brown, beak 1.1-2.0 mm long, straight, bent or curved to ventral side
Very distinctive. The only large buttercup found on the Auckland and Campbell Island groups. It appears closest to R. pachyrrhizus and R. viridis. It differs from R. pachyrrhizus by its glabrous to sparsely hairy rather than densely hairy leaves which are shallowly 3-7-lobed and 20-80 mm diam., rather than 1-2-ternatifid and 15-30 mm diam., and by the short, ascending, deeply buried rather long trailing exposed rhizomes. Ranunculus viridis is a much smaller bright green plant confined to the southern end of Stewart island.
December - January
February - April
Difficult. Should not be removed from the wild.
Not Threatened. Listed because it is a narrow range island endemic. It is however, abundant within its known habitats.
ranunculus: From the Latin ‘rana’ frog, meaning little frog and probably refers to the plants typical marshy habit where frogs abound
Where To Buy
Not commercially available.
Fact Sheet prepared by P.J. de Lange (12 February 2007). Description based on Fisher (1965).
References and further reading
Fisher, F.J.F. 1965: The alpine Ranunculi of New Zealand. Bulletin, New Zealand Department of Scientific and Industrial Research 165: 1-192.
Please cite as: de Lange, P.J. (Year at time of access): Ranunculus pinguis Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/ranunculus-pinguis/ (Date website was queried)