Lomatia tasmanica facts for kids

Kids Encyclopedia Facts

Quick facts for kids King's lomatia

Lomatia tasmanica growing in the Hobart Botanical Garden
Conservation status
Critically endangered (EPBC Act)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Proteales
Family:	Proteaceae
Genus:	Lomatia
Species:	L. tasmanica
Binomial name
*Lomatia tasmanica* W.M.Curtis
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Lomatia tasmanica, commonly known as King's lomatia or King's holly, is an ancient shrub native to the wilderness of Tasmania. It is one of the rarest and oldest living plants in the world. King's lomatia belongs to the Proteaceae family, which also includes plants like banksias, grevilleas, and macadamia trees.

This unusual plant grows up to 8 metres (26 ft) tall and has shiny green leaves with toothed edges. In the Australian summer, it produces bright red flowers. However, it never produces any fruit or seeds.

Every single King's lomatia plant living in the wild today is an exact genetic clone of one original ancestor. Scientists have found fossil leaves identical to this plant that are more than 43,600 years old. This means the single plant organism has survived through thousands of years by naturally cloning itself over and over again.

What Is King's Lomatia?

Physical Appearance and Plant Structure

King's lomatia grows as a straggly shrub or a small tree. While some specimens can reach a height of 8 metres, their long trunks often bend under their own weight. Old stems can reach a thickness of about 8 centimetres across.

The younger branches near the top of the bush are covered in a fine, rust-coloured fuzz. The leaves are arranged alternately along the stems, clustering near the ends of the branches. Each leaf measures between 10 and 18 centimetres in length.

The leaves are pinnate, meaning they are divided into smaller leaflets arranged along a central stem like a feather. A single leaf can have between 11 and 25 distinct lobes with jagged, saw-like teeth along their edges. The upper side of the leaf is smooth and shiny green, while the underside has small hairs along the main leaf vein.

Unique Red Summer Flowers

During the warmest part of the year, usually in February, the plant produces clusters of flowers known as inflorescences. These flower clusters grow at the ends of branches and measure around 9 to 10 centimetres long.

The flowers are a striking crimson red colour. Unlike most flowering plants that attract insects or birds to spread pollen and create seeds, the flowers of King's lomatia cannot produce viable seeds. Because the plant cannot create seeds, the flowers eventually drop off without leaving behind any fruit.

Discovery and Scientific Naming

Deny King's Remarkable Find

The plant was first discovered in May 1934 by Charles Denison "Deny" King. King was a legendary Tasmanian naturalist, bushman, and tin miner who spent decades exploring the rugged, trackless wilderness of south-west Tasmania.

While working in the remote region near Port Davey, King noticed an unusual shrub with bright red blossoms. Realising it was unlike any other plant he had seen in the bush, he took samples. In 1965, he sent plant specimens from Cox's Bight to scientists in Hobart to be officially examined.

Formal Description by Winifred Curtis

In 1967, botanist Winifred Curtis of the Tasmanian Herbarium studied the specimens. She confirmed that it was a completely new species to science and officially named it Lomatia tasmanica in honour of Deny King.

Although people sometimes call it "King's holly" because its prickly leaves look like European holly, it is not related to true holly plants. Its closest botanical relatives are other Australian shrubs in the genus Lomatia, such as Lomatia polymorpha and Lomatia tinctoria.

How King's Lomatia Clones Itself

The Secret of Triploid Genetics

Most plants and animals are diploid, meaning they inherit two complete sets of chromosomes: one from each parent. Chromosomes carry the genetic blueprint, or DNA, that tells an organism how to grow and function.

King's lomatia is a triploid organism, meaning it has three complete sets of chromosomes. Having an odd number of chromosome sets makes normal sexual reproduction impossible because the chromosomes cannot divide evenly during cell division to create pollen or egg cells.

Because it is completely sterile, the plant cannot produce seeds. To survive as a species across tens of thousands of years, it relies entirely on vegetative reproduction, also known as natural cloning.

Vegetative Reproduction and Root Growth

When a branch of King's lomatia falls to the wet forest floor, nodes along the stem can sprout new roots into the damp soil. Over time, this fallen branch grows into an independent bush with its own root system.

Even though each bush looks like an individual plant, every single one shares the exact same genetic identity. They are all genetically identical parts of one massive, long-living clonal organism.

Individual trunks can live for about 300 years before decaying. However, as older trunks die, new stems root and take their place, keeping the continuous genetic chain alive indefinitely.

Fossil Evidence of Ancient Survival

In 1991, researchers discovered fossilised leaf fragments preserved in mud beds located 8.5 kilometres away from the living plants. Scientists used radiocarbon dating to measure the age of the fossil layer.

The analysis revealed that the fossil leaves were at least 43,600 years old. Microscopic examinations showed that the cellular structure and shape of the fossil leaves matched modern King's lomatia leaves down to the smallest detail.

Because naturally occurring triploid plants almost never arise from seeds, scientists concluded that the ancient fossils belonged to the exact same continuous genetic clone alive today. Some researchers estimate the clone could even be up to 135,000 years old, having survived through entire Ice Ages.

Habitat and Growing Conditions

The Cool, Wet Tasmanian Rainforest

King's lomatia survives only in the remote, rainy wilderness of south-west Tasmania, completely inside the protected Southwest National Park. This area is known for rugged mountains, button grass plains, and ancient temperate rainforests.

The climate in this part of Tasmania is very wet and cool. The habitat receives more than 1,700 millimetres of rainfall each year. King's lomatia requires constant moisture to survive and only grows within 25 metres of creeks, streams, and rivers.

Forest Canopy and Neighbouring Plants

King's lomatia grows primarily in dense riverbank scrub and temperate rainforest under a high canopy of tall trees measuring 8 to 15 metres high. Its natural plant neighbours include:

Myrtle beech (Lophozonia cunninghamii)
Celery-top pine (Phyllocladus aspleniifolius)
Southern sassafras (Atherosperma moschatum)
Leatherwood (Eucryphia lucida)
Smithton peppermint eucalyptus (Eucalyptus nitida)

The Rainforest Understory

Beneath the tall trees, King's lomatia shares space with many specialised understory shrubs, ferns, and mosses that thrive in the deep shade and moist air:

Native plum (Cenarrhenes nitida)
White waratah (Agastachys odorata)
Climbing heath (Prionotes cerinthoides)
Hard water fern (Parablechnum wattsii)
Horizontal scrub (Anodopetalum biglandulosum)

The heavy growth of mosses and lichens on tree trunks highlights the extreme humidity and constant dampness of the plant's native home.

Threats and Conservation Efforts

Why Is King's Lomatia Critically Endangered?

King's lomatia is classified as "Critically Endangered" by the Australian government and "Endangered" under Tasmanian conservation laws. It faces several major threats in the wild:

Extremely small population: For decades, only one small wild population was known, containing roughly 500 to 600 plants spread across an area just 1.2 kilometres long. A second wild population was discovered in south-west Tasmania in 2026, but the overall wild population remains exceptionally small.
No genetic variation: Because every plant is an identical clone, the species has zero genetic diversity. If a single disease evolves that can kill one plant, every single wild plant is equally vulnerable to that disease.
Risk of bushfires: While south-west Tasmania is very wet, dry spells can lead to devastating bushfires. The original group discovered by Deny King in 1934 was destroyed by fire.
Root-rot disease: The destructive soil water mould Phytophthora cinnamomi causes severe root rot in native Australian plants. Infestations of this microscopic pathogen have been found only 20 metres away from wild populations.

Protecting the Wild Plants

To protect the remaining wild plants from accidental damage, trampling, or the introduction of soil diseases carried on hikers' boots, the Tasmanian government keeps the exact locations of both wild populations strictly secret.

Access to these remote wilderness zones is tightly restricted. Scientists visiting the area must follow strict quarantine cleaning procedures to ensure no spores of root rot are carried into the habitat.

Backup Collections in Botanical Gardens

To make sure King's lomatia does not vanish from Earth, conservationists at the Royal Tasmanian Botanical Gardens in Hobart have been growing backup plants since 1994.

Horticulturalists carefully take cuttings during January and February. These cuttings take up to 12 months in temperature-controlled greenhouses to produce roots.

Growing King's lomatia in cultivation is extremely difficult because the roots die quickly if the soil dries out or becomes waterlogged. To help the plants survive in gardens, botanists have successfully grafted King's lomatia stems onto the sturdier root systems of related species, such as Lomatia tinctoria.

Scientific Importance of the Ancient Clone

Chemistry and Unique Compounds

Researchers at the University of Tasmania have studied the chemical profile of King's lomatia leaves. Using modern extraction methods, scientists identified several natural protective compounds inside the plant, including nonacosane, heptacosane, and juglone.

Juglone is a natural pigment and chemical defence compound that helps plants protect themselves. The presence of specific chemical compounds helps scientists trace how ancient plants evolved millions of years ago when Tasmania was still connected to Antarctica and South America as part of the ancient supercontinent Gondwana.

A Living Window into the Past

King's lomatia is one of the most remarkable examples of botanical resilience on planet Earth. Without ever producing a seed, a single plant organism has survived changing climates, Ice Ages, and thousands of years of wilderness history simply by continuing to grow and branch.

Today, scientists, park rangers, and botanical gardens work closely together to ensure this ancient survivor remains protected in the Tasmanian wilderness for future generations to study and admire.