Wisteria (Wisteria sinensis / floribunda)
Wisteria sinensis / floribunda
Horse
Severe
Any suspected ingestion is an immediate veterinary emergency. Only a few pods/seeds are sufficient to cause severe poisoning.
Equio informs, it does not diagnose. When in doubt, call your vet.
What to do now
- Antidote
- No specific antidote. Intensive symptomatic and supportive treatment (IV fluids, activated charcoal, anti-emetics).
- Time to signs
- 15 minutes to a few hours
- Prognosis
- Grave. Death by exhaustion and collapse is possible if the ingested dose is significant.
- Immediate veterinary emergency.
- Gastric lavage if ingestion is recent.
- Administration of activated charcoal.
- IV fluids to support the heart and hydration.
Its ID card
- Height
- 3 m – 15 m+
- Flowering
- April to June
- Toxic parts
- The entire plant, but seeds, pods, and bark are by far the most concentrated in toxins.
- Toxin
- Saponins, lectins (Wisterin), and canavanine.
- Habitat
- Arbors, pergolas, old walls, facades, often very vigorous.
- Soil indicator
- Deep, rich soils, sunny exposure.
- Regions
- Europe (Gardens, house facades)
- In hay
- Yes — stays toxic once dried
- Palatability
- Low to medium. The seeds resemble legumes and may attract some horses, as do the smooth young shoots in spring.
When the risk rises
August to November (falling pods/seeds).
Spotting it in the field
Laburnum (yellow flower clusters, also deadly), Black Locust (white flowers). — smell : flowers have a sweet, fragrant scent. leaves and stems have no notable distinctive smell.
- Woody vine forming thick, braided trunks with age.
- Leaves composed of light green leaflets.
- Very large, pendulous clusters of pea-like flowers in purple/violet, white, or pink in spring.
- Thick, hairy pods, green then brown, persisting into winter.
Signs to watch for
Acute toxicity.
Dose : A few pods or a handful of seeds for an adult horse.
- Very violent and prolonged colic
- Watery to bloody diarrhea
- Extreme sweating (horse is dripping with sweat)
- Prostration, severe depression
- Cardiovascular collapse (horse collapses)
Who is affected
Other species : Very toxic to dogs, cats, and children (severe gastrointestinal syndromes).
In pregnant mares : abortion is very probable (toxic shock).
Getting rid of it
Method : Uproot the entire plant, including the roots, wearing gloves. Destroy cut parts to prevent spread.
- Identify and remove all Wisteria plants from pastures and areas accessible to horses.
- Closely monitor horses during the fruiting season (August-November).
- Educate staff on the dangers of Wisteria.
Frequently asked questions
Can Equio identify Wisteria (Wisteria sinensis / floribunda) from a photo?
It can help organize visual clues, but plant identification must remain cautious when horse health is at stake.
Is Wisteria (Wisteria sinensis / floribunda) dangerous in hay?
This entry flags hay vigilance. Isolate suspicious forage and ask for professional advice if exposure is possible.
This page is informational. If ingestion is likely, if signs appear, or if the horse is fragile, contact a veterinarian immediately.