Ranunculus glabrifolius

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Species

Ranunculus glabrifolius

Etymology

Ranunculus: From the Latin 'rana' frog, meaning little frog and probably refers to the plants typical marshy habit where frogs abound
glabrifolius: hairless leaves

Common Name(s)

waoriki

Current Conservation Status

2012 - Not Threatened

Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB

Previous Conservation Status

2009 - Not Threatened
2004 - Not Threatened

Authority

Ranunculus glabrifolius Hook.

Family

Ranunculaceae

Flora Category

Vascular - Native

NVS Species Code

RANGLA

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.

Structural Class

Dicotyledonous Herbs other than Composites

Synonyms

Ranunculus rivularis var. major Benth.; Ranunculus inundatus R.Br. ex DC. p.p.; Ranunculus rivularis var. inundatus (R.Br. ex DC.) Rodway

Distribution

Indigenous. New Zealand (North, South, Stewart and Chatham Islands). Also Australia.

Habitat

Coastal to montane. Often partially submerged in shallow water, wet grassland and lake, pond or tarn marginal turf communities. Sometimes in moist clearings within forest or tussock grassland.

Features

Perennial with rosettes tufted along a slender creeping rhizome usually with swollen nodes. Basal leaves on slender erect or ascending petioles 50-150(-250) mm long; lamina trifoliolate to palmatisect, usually with at least 1-2 hairs, sometimes more, ± circular, or slightly broader than long, 10-30(-50) mm diameter; leaflets sessile, divided again to at least ½ way, sometimes again toothed, ± equal, the lateral leaflets sometimes divided to base; leaves of flowering stems smaller with 1-3 linear, acute, entire segments. Flowering stems erect to c.300 mm long (rarely sessile), 1-3(-5)-flowered, usually appressed-hirsute. Flowers 12-15(-20) mm diameter; pedicels glabrous. Sepals ± recurved, glabrous or hairy. Petals 5-10(-15), 5-11 mm long, golden yellow, oblanceolate to obovate, shortly clawed; nectary single, 1-2 mm from petal base, pocket-like. Receptacle glabrous. Achenes 5-20, hardly flattened, glabrous; body 2.0-2.5 mm long; style straight or curved, 1.5-2.0 mm long.

Similar Taxa

Superficially similar to R. amphitrichus from which it is only reliably distinguished in the field by the receptacle which is completely glabrous rather than furnished with a basal collar of bristly hairs.

Flowering

October - January

Flower Colours

Yellow

Fruiting

December - May

Propagation Technique

Easily grown from fresh seed and by the division of whole plants. An attractive plant suitable for growing on the margin of a fish pond or slow flowing stream. It has larger and more richly coloured flowers than R. amphitrichus.

The New Zealand Plant Conservation Network