Mount Cook buttercup
Ranunculus lyallii, family Ranunculaceae
New Zealand’s giant white buttercup with lily-like leaves
This is the largest buttercup in the world, growing over a metre tall in New Zealand’s alpine zones. It has glossy round leaves and large white flowers with yellow centres, blooming in late spring to early summer.
- Largest species in the buttercup genus
- Only buttercup with peltate (shield-shaped) leaves
- Endemic to New Zealand’s alpine regions
- Featured on NZ postage stamps since 1936
- Named after botanist David Lyall
What does Mount Cook buttercup look like?
Ranunculus lyallii stands out among buttercups for its size, it can reach more than a metre high. Its leaves are dark green, shiny, and shaped like shields up to 40 cm across. The flower itself is 5 to 8 cm wide, with ten to twenty white petals surrounding a cluster of yellow stamens.
Where does Mount Cook buttercup come from?
This plant grows only in New Zealand, found naturally in high-altitude areas of the South Island and on Stewart Island. It was first collected by Scottish botanist David Lyall during his explorations in the 19th century and later described by Sir Joseph Hooker.
When and how Mount Cook buttercup blooms
It thrives in alpine environments between 700 and 1,500 metres above sea level. As a herbaceous perennial, it returns each year from a thick underground rhizome. Blooms appear from late spring through early summer in its native habitat.
How Mount Cook buttercup is used
Though not used in rituals or medicine, it has become a national symbol. It once served as the logo for Mount Cook Airline and has appeared on postage stamps since 1936, often highlighting New Zealand’s natural scenery and conservation efforts.
What Mount Cook buttercup means
Locally called the Mount Cook lily despite not being a true lily, it is celebrated as an icon of New Zealand’s mountain landscapes. Its image has been widely used in tourism and national branding, reflecting pride in the country’s unique flora.
Where Mount Cook buttercup is used and seen
Questions people ask about Mount Cook buttercup
Where does Ranunculus lyallii come from?
It is native only to New Zealand, growing in alpine areas of the South Island and Stewart Island at elevations from 700 to 1,500 metres.
Why is it called the Mount Cook lily?
Shepherds gave it that name because of its large, lily-like leaves, though it is actually a buttercup and not related to true lilies.
When does it bloom?
In its natural habitat in New Zealand, it flowers from late spring to early summer, typically November to January.
Is it used in any cultural practices?
It has no known role in religious or traditional ceremonies but has been used as a national emblem on airline logos and postage stamps.
What makes this buttercup unusual?
It is the tallest buttercup species and the only one with peltate leaves, round, shield-like leaves where the stalk attaches near the centre.
Good reading and sources
- Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
- Where it has been recordedGBIF, Plant database
- Sightings and photos by naturalistsiNaturalist, Plant database
- Ranunculus lyallii on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Ranunculus lyallii", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.
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