Thorn Apple Toxic?

Updated 2026-03-06| 5 min read| 3,978 found this helpful

Crataegus douglasii is confirmed non-toxic to cats, dogs, and horses, with no ingestion risk reported.

No adverse toxic reactions are expected from incidental small-volume consumption of this plant by humans or listed animals.

The plant shares common names with several highly toxic species, so accurate identification is critical to avoid misclassification risk.

FAQ

Is Thorn Apple toxic to Humans?

No confirmed toxic effects reported for incidental ingestion; consult a medical provider if unusual symptoms occur after consuming very large volumes. (Non-toxic)

Is Thorn Apple toxic to Cats?

No toxic symptoms expected, as the species is confirmed non-toxic to cats. (Non-toxic)

Is Thorn Apple toxic to Dogs?

No toxic symptoms expected, as the species is confirmed non-toxic to dogs. (Non-toxic)

Is Thorn Apple toxic to Horses?

No toxic symptoms expected, as the species is confirmed non-toxic to horses. (Non-toxic)

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Toxicity Details

Humans

Non-toxic

No confirmed toxic effects reported for incidental ingestion; consult a medical provider if unusual symptoms occur after consuming very large volumes.

Cats

Non-toxic

No toxic symptoms expected, as the species is confirmed non-toxic to cats.

Dogs

Non-toxic

No toxic symptoms expected, as the species is confirmed non-toxic to dogs.

Horses

Non-toxic

No toxic symptoms expected, as the species is confirmed non-toxic to horses.

Toxicity Snapshot

Toxic PartsNo confirmed toxic plant parts identified; all common plant tissues are considered safe for typical exposure levels in listed species.

Exposure RouteOral ingestion is the only common potential exposure route; no dermal or inhalation toxicity has been reported for this species.

Toxic CompoundsFlavonoids, procyanidins, and triterpenic acids are the primary identified bioactive compounds, with no confirmed toxic constituents at standard exposure levels

First Aid & Prevention

First 30 Minutes

• Rinse the mouth of the exposed person/animal to remove remaining plant debris.
• Monitor for mild, non-toxic gastrointestinal discomfort for 2 to 4 hours post-ingestion.
• Do not induce vomiting unless explicitly directed by a healthcare or veterinary professional.

Contact Vet Immediately

• If your animal shows persistent vomiting, diarrhea, or lethargy after ingesting unusually large volumes of the plant.
• If you cannot confirm the plant's identity and suspect it may be a toxic lookalike species.
• If the exposed animal has pre-existing gastrointestinal health conditions that increase sensitivity to plant intake.

Prevention

• Confirm full plant identification before allowing companion animals or livestock to graze in areas with wild Crataegus populations.
• Store any harvested Crataegus products out of reach of young children and animals to avoid excessive consumption.
• Cross-reference plant identities with trusted toxicology databases if you are uncertain about a plant's safety status.

Treatment & Prognosis

• Only supportive care is needed if mild, incidental gastrointestinal upset occurs after large ingestion.
• No specific antidote is required, as no toxic constituents have been identified in this species.
• Treat any unrelated adverse reactions symptomatically as directed by a qualified healthcare provider.

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Professional Toxicology

Scientific NameCrataegus douglasii

AliasesWeisdornbluten、Blackthorn、Black Hawthorn、Thorn Plum、Pirliteiro、Red Hawthorn、May Bush、Oxyacantha、Haw Apple、Black Haw、Aubepine

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No target organ toxicity reported for this Crataegus species at standard exposure levels

Mechanism of Action

• No toxic mechanisms identified; bioactive compounds in this species are generally well-tolerated by humans and all listed animal species

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: No confirmed toxicity reported, considered safe for grazing at typical intake levels

Sheep: No confirmed adverse effects from incidental ingestion of this Crataegus species

Poultry: No toxic reactions reported for small intake; monitor for mild gastrointestinal upset if large volumes are consumed

Confusion Risk

The following plants look similar and may be confused:

Toxic Thorn Apple Datura stramonium

Both plants share the common name 'Thorn Apple', creating high misclassification risk. D. stramonium has large trumpet-shaped flowers and spiny seed pods, while C. douglasii has small clustered flowers and tiny edible apple-like pomes.

Sloe Blackthorn Prunus spinosa

C. douglasii is often referred to as Blackthorn, a common name shared with toxic P. spinosa. P. spinosa produces sour blue-black sloe fruits and has very sharp, rigid thorns, while C. douglasii has softer thorns and sweet-tart red/black pomes.

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Related Toxic Plants

Cherry Laurel

Prunus laurocerasus

High toxicity; cyanogenic glycosides in foliage can cause fatal cyanide poisoning in all companion animals and livestock

Black Cherry

Prunus serotina

Moderate to high toxicity; wilted leaves are the most toxic part, posing extreme acute poisoning risk to grazing horses

Common Apricot

Prunus armeniaca

Moderate toxicity; seeds and wilted foliage contain cyanide compounds that cause acute poisoning if ingested in large volumes

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Data Sources

1. ASPCA Animal Poison Control

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.