Petty Spurge
ExplorePlants
Petty Spurge
euphorbia peplus
Petty Spurge (Euphorbia peplus), also widely known as radium weed, is a small, fast-growing annual plant native to Europe, North Africa, and Western Asia, but now widely naturalized across the globe. Despite its unassuming, weed-like appearance, this plant holds significant ecological and medical interest. It thrives in disturbed soils, gardens, and urban sidewalk cracks, effortlessly establishing itself where other plants struggle to grow. Historically used in traditional folk medicine, its toxic, milky white sap contains a compound called ingenol mebutate, which has been scientifically studied and approved for treating precancerous skin conditions like actinic keratosis.
Habitat: Commonly found in nutrient-rich disturbed soils, domestic gardens, cultivated fields, waste ground, and pavement cracks in urban environments.
Appearance
This delicate annual herb grows between 5 to 30 cm tall, featuring smooth, hairless, bright green to slightly reddish-tinged stems. Its leaves are alternate, oval-shaped, and short-petioled, measuring up to 2 cm in length. The plant is easily recognized by its distinctive umbrella-like branching pattern at the top, which supports tiny, pale green flowers (cyathia) surrounded by crescent-shaped glands with sharp 'horns'. When any part of the stem or leaf is broken, it immediately exudes a thick, sticky, milky-white latex sap.
KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderMalpighialesFamilyEuphorbiaceaeGenusEuphorbia
Category
PlantsRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
Petty Spurge seeds can lie dormant in the soil for several years, waiting for the ground to be disturbed before germinating.
The chemical compound ingenol mebutate, isolated from this plant's sap, was approved by the FDA in 2012 as a gel treatment for precancerous skin lesions.
The plant's popular nickname 'Radium Weed' refers to its historical use as a home remedy for burning off sunspots and warts, similar to radiation treatments.
Special abilities
Ability
Chemical Defense Latex
Produces a toxic, caustic milky sap that deters herbivores and protects damaged tissue from bacterial and fungal pathogens.
Ability
Ballistic Seed Launching
Utilizes explosive seed capsules that split violently when dry, catapulting seeds several feet away from the parent plant.
Ability
Ant-Attracting Seed Coating
Seeds have a specialized lipid-rich appendage called an elaiosome that coaxes ants into carrying them safely underground.
Measurements & details
- Length
- 5-30 cm
- Weight
- 0.005-0.05 kg
- Lifespan
- 0-1 years
Diet & Feeding
As a photosynthetic plant, Petty Spurge synthesizes its own organic compounds using sunlight, water, carbon dioxide, and essential soil nutrients.
Primary Foods
- Sunlight
- Water
- Carbon dioxide
- Soil nitrogen
- Phosphorus
Foraging Method
- Photosynthesis
Ecological connections
eaten by
Spurge Hawk-moth
Hyles euphorbiae
Caterpillars of this moth feed on the toxic leaves, sequestering the plant's toxins to defend themselves against predators.
mutualism
Argentine Ant
Linepithema humile
Ants collect the seeds to feed on the nutritious elaiosome, inadvertently planting them safely underground.
mutualism
Western Honey Bee
Apis mellifera
Honey bees occasionally visit the tiny flowers for nectar, acting as minor pollinators.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Petty Spurge?
The easiest way to identify Petty Spurge is to use the Snappit nature identifier app.
How long is Petty Spurge?
5-30 cm
How much does Petty Spurge weigh?
0.005-0.05 kg
How long does Petty Spurge live?
0-1 years
What does Petty Spurge eat?
As a photosynthetic plant, Petty Spurge synthesizes its own organic compounds using sunlight, water, carbon dioxide, and essential soil nutrients.
Where is Petty Spurge usually found?
Commonly found in nutrient-rich disturbed soils, domestic gardens, cultivated fields, waste ground, and pavement cracks in urban environments.
How does Petty Spurge hunt?
Photosynthesis
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