Koster'S Curse
ExplorePlants
Koster'S Curse
miconia crenata
Koster's Curse (Miconia crenata, formerly Clidemia hirta) is a notorious perennial shrub native to the tropical Americas that has earned a reputation as one of the world's most aggressive invasive plant species. Thriving in warm, humid climates, this fast-growing understory plant quickly forms dense, impenetrable thickets that block sunlight and crowd out native flora. While its dark blue-purple berries and fuzzy leaves may look appealing, they are a harbinger of ecological disruption in regions like Hawaii, Australia, and parts of Asia where it has been introduced. In its native range, the plant is kept in check by local herbivores and pathogens. However, when introduced to new territories without these natural predators, it spreads relentlessly. This resilience makes Koster's Curse a key subject for ecological studies focusing on biological control and invasive species management, serving as a powerful reminder of how human-mediated transport can alter ecosystems.
Habitat: Found in tropical rainforest understories, disturbed forest margins, riparian zones, and moist pastures.
Appearance
This erect shrub typically grows between 50 and 300 centimeters tall, easily identified by its distinctive hairy stems and leaves. The opposite, egg-shaped green leaves have finely scalloped margins and feature five prominent longitudinal veins running from the base to the tip. Both the leaves and the reddish stems are densely covered in stiff, bristly hairs. It produces small, cluster-borne white or pale pink flowers with five petals, which develop into rounded, hairy berries that ripen from green to a deep, dark blue-purple or black.
KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderMyrtalesFamilyMelastomataceaeGenusMiconia
Category
PlantsRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
In Hawaii, it has spread to cover over 100,000 acres, threatening many endangered native Hawaiian plants and animals by completely changing the understory habitat.
It is recognized as one of the 'World's 100 Worst Invasive Alien Species' by the IUCN due to its devastating impact on native ecosystems.
The common name 'Koster's Curse' stems from William Koster, who accidentally introduced the plant to Fiji in the late 19th century, leading to a massive agricultural headache.
Special abilities
Ability
Prolific Seed Production
A single mature plant can produce thousands of seeds per year, allowing it to rapidly build up a massive seed bank in the soil.
Ability
Shade Tolerance
It can survive and photosynthesize in deep forest shade, waiting for a canopy gap to open before growing rapidly to dominate the space.
Ability
Rapid Regeneration
If damaged by fire, cutting, or grazing, Koster's Curse can quickly sprout back from its root crown or stem fragments.
Measurements & details
- Length
- 50-300 cm
- Lifespan
- 5-15 years
Diet & Feeding
As a photosynthetic plant, it generates its own energy from sunlight, water, and carbon dioxide while absorbing essential minerals from the soil.
Primary Foods
- Sunlight
- Water
- Carbon Dioxide
- Soil Nitrogen
- Phosphorus
Ecological connections
eaten by
Koster's Curse Beetle
Lius poseidon
The larvae of this buprestid beetle mine the leaves of the plant, acting as a biological control agent.
mutualism
Warbling White-eye
Zosterops japonicus
This bird feeds on the dark berries and inadvertently disperses the seeds across Hawaiian forests.
parasite
Koster's Curse Fungus
Colletotrichum gloeosporioides f. sp. clidemiae
A pathogenic fungus introduced in Hawaii as a biocontrol agent that causes leaf spots and defoliation.
Traits
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Also known as
No aliases listed yet.
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Koster'S Curse?
The easiest way to identify Koster'S Curse is to use the Snappit nature identifier app.
How long is Koster'S Curse?
50-300 cm
How long does Koster'S Curse live?
5-15 years
What does Koster'S Curse eat?
As a photosynthetic plant, it generates its own energy from sunlight, water, and carbon dioxide while absorbing essential minerals from the soil.
Where is Koster'S Curse usually found?
Found in tropical rainforest understories, disturbed forest margins, riparian zones, and moist pastures.
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Where to spot
Park22 sightings12 species
Hawaii, US
Ho'omaluhia Botanical Garden
You might spot White-Rumped Shama, Koster's Curse, and Red Button Ginger.
View guide →
Park13 sightings12 species
Hawaii, US
Ke'anae Arboretum
You might spot Torch Ginger, Red-Crested Cardinal, and African Tulip Tree.
View guide →
Park7 sightings12 species
Hawaii, US
Lyon Arboretum
You might spot Koster's Curse and White-Rumped Shama.
View guide →
