© George Chernilevsky · CC BY 4.0 · Commons
Euonymus europaeus
Toxic🐾Gewöhnlicher Spindelstrauch · (Euonymus europaeus)
Spindle family (Celastraceae)
Description
In autumn the four-lobed, shocking-pink capsules of the spindle tree split open to reveal orange seed coats, a striking display along hedgerows and woodland edges that doubles as a warning sign of the plant's toxicity. Historically the fruit and seeds saw little medicinal use beyond ethnobotanical applications, such as the seed oil applied externally or the bark used traditionally for digestive complaints; today the species is grown almost exclusively as an ornamental shrub. All parts, especially the seeds, contain cardioactive cardenolide glycosides along with alkaloids. Poisoning is marked by a long latency of 8 to 15 hours before vomiting, cramping abdominal pain, diarrhoea and dangerous cardiac arrhythmias set in — as few as several seeds can cause serious poisoning in a child. If ingestion is suspected, contact poison control immediately, even before any symptoms appear.
🌿 Risk of confusion — read before wild-harvesting!
STRONGLY TOXIC — ALL PLANT PARTS, ESPECIALLY THE BRIGHT ORANGE SEEDS. Euonymus europaeus contains cardenolide glycosides (evonoside, evobioside, evomonoside — digitalis-like cardioactive) and sesquiterpenoid alkaloids (evonine, evonoline) plus bitter substances and saponins. Characteristic is the LONG LATENCY: symptoms appear 8–15 hours after ingestion — so the link to the plant is often recognised too late. Typical poisoning symptoms: nausea, severe vomiting, cramping abdominal pain, bloody diarrhoea, cold sweats, circulatory collapse, dilated pupils, seizures and dangerous cardiac arrhythmias (bradycardia, extrasystoles, AV block) similar to digitalis poisoning. As few as 5–10 ripe seeds can trigger severe poisoning in children; 30–40 seeds are considered potentially lethal in adults (literature values vary substantially — individual sensitivity is unpredictable). Skin contact with the sap during pruning can cause irritation and, in rare cases, contact dermatitis. On suspicion of ingestion: IMMEDIATELY contact poison control (regional centres, emergency 112/911) — even if no symptoms are yet present, because the latency masks the severity of the poisoning. Activated charcoal useful within the first hour. Never induce vomiting yourself if the affected person is already convulsing or unconscious.
External use only!
This plant must NOT be taken internally. Use only as compress, salve, or bath.
CONTRAINDICATED during pregnancy
Cardenolide glycosides and sesquiterpenoid alkaloids from Euonymus europaeus cross the placenta and are embryotoxic in animal studies; in addition, Euonymus material was historically used as an abortifacient — supporting the suspicion of uterotonic action. Any form of internal use or accidental ingestion during pregnancy is strictly contraindicated. Even garden work pruning the shrub is sensible only with gloves and without risk of injury from sap splashes.
CONTRAINDICATED during breastfeeding
Transfer of cardenolides and alkaloids into breast milk has not been sufficiently studied; given the already cardiotoxic effect at low doses in the infant (bradycardia, AV block), any self-application during breastfeeding is contraindicated. Symbolic garden use of the ornamental shrub is permitted, but any plant parts that can be picked, chewed or swallowed must be kept out of the reach of breastfeeding mothers and their infants.
CONTRAINDICATED for children
Children are the main risk group for spindle poisoning — the bright pink-orange capsule fruits and the egg-yolk-yellow seeds look attractive like sweets and appear at toddler eye level in hedges, hedgerows, parks and playground edges. In German poison control centres, Euonymus europaeus is regularly among the five most frequent childhood plant poisonings in autumn. Ingestion of 1–2 seeds usually causes only nausea; from 5 seeds upward serious symptoms are to be expected. Parents and educators: plant the shrub in family gardens only out of reach (above eye level), specifically educate children, in case of poisoning immediately call poison control and keep one ripe seed or fruit fragment for identification.
Critical drug interactions with:
Herzglykoside (Digoxin, Digitoxin, Methyldigoxin) · Kaliumverlust-Diuretika (Furosemid, Hydrochlorothiazid, Indapamid) · Antiarrhythmika (Amiodaron, Sotalol, Verapamil, Diltiazem)
The most important modern use of European spindle is as an ornamental shrub in wild hedges, woodland edges, cottage gardens and urban park and hedgerow plantings. Valued for its spectacular autumn colour (bright orange-red to purple-red) and its unmistakable pink-red, four-lobed capsule fruits with orange seed arils that remain on the bare shrub after leaf fall. In ecologically managed hedges (e.g. North German Knicks) it provides food and nesting sites for birds (robin, blackcap); the flowers are an important pollen source for wild bees, hoverflies and the spindle ermine moth (Yponomeuta cagnagella). No medicinal use — this entry explicitly documents horticultural and ecological use with a toxicity warning.
Preparation & dosage
Eponymous historical use of the very fine, dense and tough spindle wood for turned spindles for wool spinning, small toothpicks, shoemaker's wooden pegs, knitting needles, carved figures, piano keys and weaving shuttles. The hard, evenly grained wood can be worked extremely finely — hence the German names 'Spindelstrauch', 'Spillbaum' and English 'spindle tree'. The folk name 'Pfaffenhütchen' (priest's cap, French bonnet-de-prêtre) refers not to the wood but to the shape of the four-lobed capsule fruits, which resemble the square biretta cap (pileolus) of Catholic clergy.
Artist's charcoal ('powder wood', French fusain): peeled European spindle twigs carbonised in low-oxygen iron vessels yield a particularly soft, fine-drawing charcoal for artists' sketches — hence the French term 'fusain' (which is at the same time the French name of the plant). The charcoal abrades evenly on paper, blends easily with the finger and has been a standard sketching material in European art academies since the Renaissance. Until the 19th century, spindle charcoal was also used in gunpowder manufactories as a component for black powder (low sulphur content, even burn rate).
Historical folk-medicinal use of powdered ripe seed against head lice, crab lice and scabies mites in humans and livestock: the seed powder was mixed with lard, pork fat or vegetable oil and rubbed into the scalp or animal fur. The action is based on the sesquiterpenoid alkaloids contained in the seed oil (evonine, evonoline) and on the cardenolide glycosides, which act as acaricides and insecticides. Hieronymus Bock (1546) and Lonicerus (1557) already describe this application — today strictly obsolete because systemic skin absorption can cause cardiac arrhythmias with prolonged use, and safe, non-toxic alternatives (permethrin, dimeticone) are available. Pure historical documentation, NO recommendation for use.
Dyeing and craft use of the capsule fruits and orange seed arils: the carotenoids of the aril yielded a yellow-orange dye (historical application in Central European butter tincture and for wool), while the crushed pink capsule wall mordanted with alum gave a pinkish-brown wool textile shade. The dried capsule fruits are also used in floristry for autumn arrangements and dried wreaths — caution: children must NOT be assigned to collect them, as the temptation to place the bright seeds in the mouth is acutely life-threatening. The fruit is NOT a food colouring and must NOT be used for butter, cheese or baked goods.
Historical documentation only — do NOT use
These internal applications are historically documented. This plant is highly toxic — self-treatment can cause severe poisoning or death. For documentation only, explicitly NOT a recommendation.
Historically, the dried and powdered root and stem bark of European spindle was applied in homeopathic and folk-medicinal drop preparations as a drastic purgative (hydragogue) and cholagogue for constipation, dropsy (oedema) and jaundice. The North American relative Euonymus atropurpureus (Wahoo) was officially used in 19th-century Eclectic Medicine in the form of 'euonymin' as a liver and bile remedy. Mechanism: cardenolide glycosides (evonoside, evobioside, evomonoside) massively irritate the intestinal mucosa and act digitalis-like on the heart — hence the high risk of nausea, bloody diarrhoea, collapse and cardiac arrhythmias even at therapeutic doses. Today entirely obsolete and not included in any current phytotherapy guideline.
⚠ External use only
STRONGLY TOXIC — ALL PLANT PARTS, ESPECIALLY THE BRIGHT ORANGE SEEDS. Euonymus europaeus contains cardenolide glycosides (evonoside, evobioside, evomonoside — digitalis-like cardioactive) and sesquiterpenoid alkaloids (evonine, evonoline) plus bitter substances and saponins. Characteristic is the LONG LATENCY: symptoms appear 8–15 hours after ingestion — so the link to the plant is often recognised too late. Typical poisoning symptoms: nausea, severe vomiting, cramping abdominal pain, bloody diarrhoea, cold sweats, circulatory collapse, dilated pupils, seizures and dangerous cardiac arrhythmias (bradycardia, extrasystoles, AV block) similar to digitalis poisoning. As few as 5–10 ripe seeds can trigger severe poisoning in children; 30–40 seeds are considered potentially lethal in adults (literature values vary substantially — individual sensitivity is unpredictable). Skin contact with the sap during pruning can cause irritation and, in rare cases, contact dermatitis. On suspicion of ingestion: IMMEDIATELY contact poison control (regional centres, emergency 112/911) — even if no symptoms are yet present, because the latency masks the severity of the poisoning. Activated charcoal useful within the first hour. Never induce vomiting yourself if the affected person is already convulsing or unconscious.
Cardenolide glycosides and sesquiterpenoid alkaloids from Euonymus europaeus cross the placenta and are embryotoxic in animal studies; in addition, Euonymus material was historically used as an abortifacient — supporting the suspicion of uterotonic action. Any form of internal use or accidental ingestion during pregnancy is strictly contraindicated. Even garden work pruning the shrub is sensible only with gloves and without risk of injury from sap splashes.
Transfer of cardenolides and alkaloids into breast milk has not been sufficiently studied; given the already cardiotoxic effect at low doses in the infant (bradycardia, AV block), any self-application during breastfeeding is contraindicated. Symbolic garden use of the ornamental shrub is permitted, but any plant parts that can be picked, chewed or swallowed must be kept out of the reach of breastfeeding mothers and their infants.
Children are the main risk group for spindle poisoning — the bright pink-orange capsule fruits and the egg-yolk-yellow seeds look attractive like sweets and appear at toddler eye level in hedges, hedgerows, parks and playground edges. In German poison control centres, Euonymus europaeus is regularly among the five most frequent childhood plant poisonings in autumn. Ingestion of 1–2 seeds usually causes only nausea; from 5 seeds upward serious symptoms are to be expected. Parents and educators: plant the shrub in family gardens only out of reach (above eye level), specifically educate children, in case of poisoning immediately call poison control and keep one ripe seed or fruit fragment for identification.
Drug interactions
Herzglykoside (Digoxin, Digitoxin, Methyldigoxin)
The cardenolide glycosides from Euonymus europaeus (evonoside, evobioside, evomonoside) inhibit the Na⁺/K⁺-ATPase of cardiac muscle cells like digoxin; concurrent intake potentially enhances positive inotropy and negative chronotropy life-threateningly (bradycardia, AV block, ventricular arrhythmias). Clinically relevant only on accidental ingestion — then immediate cardiac monitoring.
Kaliumverlust-Diuretika (Furosemid, Hydrochlorothiazid, Indapamid)
Diuretics lower serum potassium; hypokalaemic patients react substantially more sensitively to cardenolides from Euonymus (digitalis-like toxicity already at smaller amounts). On accidental ingestion of spindle material and concurrent diuretic therapy, emergency monitoring with potassium substitution is indicated.
Antiarrhythmika (Amiodaron, Sotalol, Verapamil, Diltiazem)
Antiarrhythmics may additively enhance the negative chronotropic and dromotropic effect of cardenolides from Euonymus; risk of sinus bradycardia, higher-grade AV block and asystole. In accidental poisoning, administration of anticholinergics (atropine) is the first-line measure; for refractory bradycardia, temporary pacemaker.
Laxanzien und Reizabführmittel (Bisacodyl, Senna, Rizinusöl)
Euonymus bark and seeds are themselves strongly laxative (irritation of intestinal mucosa by cardenolides and saponins); with concurrent use of classical laxatives, massive fluid and electrolyte loss with consecutive hypokalaemia threatens — which in turn enhances the cardiotoxicity of the cardenolides. Vicious circle on accidental ingestion.
Glucocorticoide (Prednisolon, Dexamethason)
Longer-term glucocorticoid therapy leads to hypokalaemia and sodium retention — both factors that increase sensitivity to cardenolides. With accidental spindle poisoning under ongoing steroid therapy, close electrolyte and ECG monitoring is required.
Contraindications
- Any form of oral self-administration of Euonymus material — no safe home dose possible; cardenolide content varies with site, ripeness and storage
- Pre-existing cardiac disease, cardiac arrhythmias, heart failure — cardenolides from Euonymus act digitalis-like and can trigger life-threatening arrhythmias
- Concurrent therapy with digitalis glycosides (digoxin, digitoxin) or other cardioactive glycosides — additive cardiotoxicity
- Hypokalaemia, diuretic therapy with potassium loss — substantially enhances sensitivity to cardenolides
- Existing gastrointestinal disease (gastric ulcer, colitis, irritable bowel) — the mucosa-irritant effect worsens the underlying condition
- Pregnancy, breastfeeding, children and adolescents (see above)
- Households with dogs, cats, birds, horses or rodents — all plant parts are toxic to pets and grazing animals (particularly dangerous in horses)
Harvested part: fruits and seeds
- Time of day:
- Dry mornings in September to October, as soon as the capsules open into four lobes and the orange seed arils become visible. PROTECTIVE GLOVES MANDATORY — plant sap is skin-irritant, seeds highly toxic. Exclusively for floristic, decorative or dyeing purposes (dried arrangements, wool, artist's charcoal preparation); NO food or medicinal use. Clearly label collection vessels and store out of reach of children and pets.
- Drying:
- Dry opened capsules with the seed arils in air in the shade (1–2 weeks), with good air circulation. For dried bouquets: hang branches with capsules upside down in bundles. Direct sunlight quickly bleaches the pink coloration of the capsule wall. For dyeing applications, capsules are processed fresh (crushed and boiled with alum mordant).
- Storage:
- Dry, cool (10–18 °C), dark, in labelled containers ('Euonymus europaeus — toxic, NOT food') inaccessible to children and pets. Never store in kitchen cabinets or among edible dried fruits. Dried capsules retain toxicity for years.
- Time of day:
- Dormancy phase in late autumn and winter (November to February), when the wood has the lowest residual moisture — optimal for carving, turning and for carbonisation into artist's charcoal ('fusain'). Cut only in frost-free weather; protective gloves due to skin-irritant sap. Twiggy shoots (1–2 cm diameter) are suitable for artist's charcoal; older stem sections (3–5 cm) for turned spindles and carved figures.
- Drying:
- Debark cut wood and let it dry airily in the shed for 6–12 months (target wood moisture below 12 %). For artist's charcoal, twigs are peeled, cut to size and carbonised in closed iron vessels (tobacco tin, old bean can with a hole in the lid) in a charcoal fire for 1–2 hours — the lack of oxygen carbonises the wood without burning it.
- Storage:
- Wood storage dry, frost-free, well-ventilated; finished artist's charcoal stored in cardboard-lined boxes separately from hard materials (very fragile). Seal turned/carved workpieces with food-grade or beeswax — NO use for children's toys, eating utensils, chopping boards or other items with mouth contact, as residual traces of cardenolides in the wood are possible.
- EvonosideGlycosideContent: Spuren bis 0.1 % (Samen und Rinde)Seed
Bis-cardenolide glycoside and one of the main carriers of the digitalis-like cardiotoxicity of Euonymus europaeus. Like all cardenolides, inhibits the Na⁺/K⁺-ATPase of the cardiac muscle cell, leading to increased intracellular calcium concentration, positive inotropy and negative chronotropy. At high doses, the cause of the characteristic delayed poisoning symptoms with bradycardia, AV block and ventricular arrhythmias.
- EvobiosideGlycosideContent: Spuren (Samen und Rinde)Seed
Further cardenolide glycoside with two sugar residues; together with evonoside and evomonoside responsible for the cardioactive toxicity. Structurally related to the digitoxigenin derivatives of Digitalis species (commonality: steroid aglycone with an unsaturated γ-butyrolactone ring). Accumulates particularly in the ripe, egg-yolk-yellow seed aril and in the embryo.
- EvomonosideGlycosideContent: Spuren (Samen)Seed
Mono-glycoside from the cardenolide family of European spindle; complements evonoside and evobioside in the toxicity profile. Potency and absorption behaviour resemble digitoxin: high enteral bioavailability (60–80 %), long half-life, capable of accumulation — hence the delayed and protracted poisoning symptoms typical of spindle.
- EvonineAlkaloidContent: Spuren (Samen)Seed
Complex sesquiterpenoid pyridine alkaloid (polyester of several acetylated hydroxyl groups); lead alkaloid of the genus Euonymus and chemotaxonomic marker of the Celastraceae. Insecticidal and acaricidal — the basis for the historical folk-medicinal use against lice and scabies mites. Together with evonoline and further accompanying alkaloids, it additionally contributes to the overall mammalian toxicity.
- EvonolineAlkaloidContent: Spuren (Samen)Seed
Accompanying alkaloid of evonine with a similar sesquiterpenoid polyester skeleton; insecticidally active in lower concentrations in animal experiments. Within the genus Euonymus, evonoline together with evonine serves as a marker for phytochemical authenticity testing of drug material from Euonymus europaeus.
- Bitterstoffe (Euonyminoside und verwandte Sesterterpenoide)BitterContent: nicht quantifiziert (Rinde und Samen)Bark
Characteristic bitter substances of the bark and seeds that co-cause the strong nausea and emesis after ingestion. Pharmacologically they contribute to the drastically laxative effect and are named as a secondary reason for the historical use as a Wahoo-like cholagogue. Not clearly separable from the cardenolides — effects overlap.
- Carotinoide (β-Carotin, Zeaxanthin)OtherContent: deutlich nachweisbar im orangen ArillusFruit
Lipophilic pigments of the bright orange seed aril; act as a lure colour for seed-dispersing birds (robin, blackcap, song thrush), which digest the aril while the toxic seeds are excreted undigested. The intense orange colour is the result of the joint action of β-carotene and xanthophyll-like compounds.
- Fettsäuren (Linolsäure, Palmitinsäure, Ölsäure)OtherContent: Samenöl ca. 30–40 % der SamentrockenmasseSeed
European spindle seeds contain a yellowish, long-keeping seed oil with dominant linoleic acid (polyunsaturated) and palmitic and oleic acids. Historically, this oil was used in rural soap making and (in times of need) as lamp oil — no food use possible because the cardenolides and alkaloids partition into the press oil and make it toxic.
- [7]MonographCliniTox Giftpflanzen — Euonymus europaeus L.: stark giftig ++ (Institut für Veterinärpharmakologie und -toxikologie, Universität Zürich)(accessed: 2026-08-10)
- [3]BookPlants for a Future — Euonymus europaeus(accessed: 2026-05-27)
- [4]BookHenriette's Herbal Homepage — Euonymus europaeus (King's American Dispensatory, 1898)(accessed: 2026-05-27)
- [1]WikipediaGewöhnlicher Spindelstrauch — Wikipedia (DE)(accessed: 2026-05-27)
- [2]WikipediaEuonymus europaeus — Wikipedia (EN)(accessed: 2026-05-27)
- [6]CommonsEuonymus europaeus — Wikimedia Commons category(accessed: 2026-05-27)
- [5]WikidataEuonymus europaeus — Wikidata Q156005(accessed: 2026-05-27)