Spiny restharrow Toxic?

Updated 2026-03-06| 4 min read| 2,729 found this helpful

No part of Spiny restharrow is toxic to humans, cats, dogs, or horses when ingested

The only safety risk associated with the plant is mechanical puncture injury from its sharp thorns

Spiny restharrow may be visually confused with species from the Vicia (vetch) genus

FAQ

Is Spiny restharrow toxic to Humans?

No toxic ingestion symptoms reported; thorn contact may cause localized pain, redness, or minor puncture wounds (Non-toxic)

Is Spiny restharrow toxic to Cats?

No toxic ingestion symptoms reported; thorn contact may cause minor puncture injuries to skin, paws, or oral tissue (Non-toxic)

Is Spiny restharrow toxic to Dogs?

No toxic ingestion symptoms reported; thorn contact may cause minor puncture injuries to skin, paws, or oral tissue (Non-toxic)

Is Spiny restharrow toxic to Horses?

No toxic ingestion symptoms reported; thorn contact may cause puncture injuries to skin, hooves, and oral tissue (Non-toxic)

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Toxicity Details

Humans

Non-toxic

No toxic ingestion symptoms reported; thorn contact may cause localized pain, redness, or minor puncture wounds

Cats

Non-toxic

No toxic ingestion symptoms reported; thorn contact may cause minor puncture injuries to skin, paws, or oral tissue

Dogs

Non-toxic

No toxic ingestion symptoms reported; thorn contact may cause minor puncture injuries to skin, paws, or oral tissue

Horses

Non-toxic

No toxic ingestion symptoms reported; thorn contact may cause puncture injuries to skin, hooves, and oral tissue

Toxicity Snapshot

Toxic PartsNo plant parts are toxic; the only associated harm risk comes from sharp thorns present on the plant's stems and foliage

Exposure RouteDirect physical contact with thorns; no toxic ingestion risk has been documented in available studies

Toxic CompoundsNo toxic chemical compounds have been identified in peer-reviewed toxicological assessments of this species

First Aid & Prevention

First 30 Minutes

• Gently remove any visible thorn fragments from puncture sites using clean, sterilized tweezers
• Thoroughly clean the affected area with mild soap and cool running water to reduce infection risk
• Apply a mild antiseptic and sterile dressing to open puncture wounds to prevent contamination

Contact Vet Immediately

• If your pet has deep thorn punctures near the eyes, joints, nasal, or oral cavities
• If the puncture site develops swelling, pus, persistent redness, or fever 24-48 hours after exposure
• If your pet exhibits unusual lethargy, vomiting, or discomfort after ingesting large quantities of the plant

Prevention

• Wear thick, puncture-resistant gardening gloves when handling or removing Spiny restharrow
• Clear Spiny restharrow from pet play areas, yards, and livestock pastures to eliminate contact risk
• Train pets to avoid unknown spiny plants when hiking or walking in unmanaged wild areas

Treatment & Prognosis

• Minor puncture wounds only require standard wound care and monitoring for signs of infection
• Antibiotics may be prescribed by a doctor or veterinarian if a secondary bacterial infection develops
• Tetanus prophylaxis may be recommended for humans with deep, contaminated thorn puncture wounds

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Professional Toxicology

Scientific NameOnonis spinosa L.

AliasesRest harrow、Cammock、Ground furze

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No organ toxicity reported; thorn punctures may damage skin, soft tissue, mucous membranes, and occasionally hoof tissue in horses

Mechanism of Action

• No toxic physiological mechanism has been identified; all reported harm arises from mechanical puncture by sharp thorns

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep, and goats: No toxic ingestion risk reported; thorn punctures may cause mouth, gastrointestinal, or foot injuries if the plant grows in pastures

Small companion mammals (rabbits, guinea pigs): No confirmed toxicity; thorn contact may cause minor puncture injuries to exposed skin and paw pads

Confusion Risk

The following plants look similar and may be confused:

Vetch species Vicia spp.

Both belong to the Fabaceae family with similar legume flowers and pinnate foliage; Spiny restharrow is distinguished by its prominent sharp thorns, which are absent on most common Vicia species

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Related Toxic Plants

Golden chain tree

Laburnum anagyroides

Severe toxicity

Black locust

Robinia pseudoacacia

Moderate to High toxicity

Chinese wisteria

Wisteria sinensis

Moderate toxicity

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Data Sources

1. CliniTox (Universität Zürich)

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