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 threat classification 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) – more information about this can be found on the NZTCS website 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. Please note, threat classifications are often suggested by authors when publications fall between NZTCS assessment periods – a suggested threat classification status has not been assessed by the NZTCS panel.
2017 | Not Threatened | Qualifiers: DP
Previous conservation statuses
2012 | Not Threatened | Qualifiers: DP
2009 | At Risk – Declining | Qualifiers: DP
2004 | Gradual Decline
Endemic. North and South Islands from Lake Whangape south.
Coastal to lowland. Usually found in raupō (Typha orientalis) dominated wetlands where it grows in still moderately deep to deep water.
Wetland plant indicator status rating
Information derived from the revised national wetland plant list prepared to assist councils in delineating and monitoring wetlands (Clarkson et al., 2021 Manaaki Whenua – Landcare Research Contract Report LC3975 for Hawke’s Bay Regional Council). The national plant list categorises plants by the extent to which they are found in wetlands and not ‘drylands’. The indicator status ratings are OBL (obligate wetland), FACW (facultative wetland), FAC (facultative), FACU (facultative upland), and UPL (obligate upland).
OBL: Obligate Wetland
Almost always is a hydrophyte, rarely in uplands (non-wetlands).
Small perennial herb. Leaves in rosettes, tufted along a slender, creeping, buried stem; linear to spoon-shaped, not toothed, hairless, with long stems, up to 14cm long when permanently submerged. Flowers yellow to purple, solitary, 6-8mm diameter, with 4 linear petals and 4 spreading sepals; on stalks 1-2cm tall.
Limosella lineata. Leaves of mud buttercup are linear to spoon-shaped, slightly curved, with a smaller leaf sheath that Limosella lineata, which has purely linear leaves. Other buttercups have toothed or lobed leaves. Mud buttercup has buried stems, while Limosella lineata stems creep along the surface.
Violet/Purple, Yellow, Red/Pink
Easy to grow from fresh seed and rooted pieces. Best in a pond or kept in semi-submerged pots.
Habitat modification, eutrophication from uncontrolled nutrient run off, fertilisers, and drains are major porblems throughout its range. Invasive aquatic weeds are a problem in many areas.
ranunculus: From the Latin ‘rana’ frog, meaning little frog and probably refers to the plants typical marshy habit where frogs abound
limosella: From the Latin ‘limosus’ mud, refers to the habit of growing in mud
Where To Buy
Not commercially available
Fact Sheet prepared for NZPCN by P.J. de Lange (30 August 2003).
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Ranunculus limosella Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/ranunculus-limosella/ (Date website was queried)