Spring Parsley Toxic?

Updated 2026-03-06| 5 min read| 4,049 found this helpful

Cymopterus watsonii

Spring Parsley is confirmed toxic to cats, dogs, and horses per ASPCA data

Furanocoumarins are the primary toxic principle that triggers adverse reactions

Exposure leads to sunburn and dermatitis, especially in light-skinned animals exposed to sunlight

FAQ

Is Spring Parsley toxic to Humans?

No confirmed human toxicity data available, but furanocoumarin exposure may cause mild skin irritation or photosensitivity in sensitive individuals (Low)

Is Spring Parsley toxic to Cats?

Photosensitization including sunburn, blistering, and dermatitis, particularly on unprotected light-skinned areas (Low)

Is Spring Parsley toxic to Dogs?

Photosensitization including sunburn, blistering, and dermatitis, particularly on unprotected light-skinned areas (Low)

Is Spring Parsley toxic to Horses?

Photosensitization including sunburn, blistering, and dermatitis, particularly on unprotected light-skinned areas (Low)

Not sure which plant? Snap a photo to ID in 1 secondGet App

Toxicity Details

Humans

Low

No confirmed human toxicity data available, but furanocoumarin exposure may cause mild skin irritation or photosensitivity in sensitive individuals

Cats

Low

Photosensitization including sunburn, blistering, and dermatitis, particularly on unprotected light-skinned areas

Dogs

Low

Photosensitization including sunburn, blistering, and dermatitis, particularly on unprotected light-skinned areas

Horses

Low

Photosensitization including sunburn, blistering, and dermatitis, particularly on unprotected light-skinned areas

Toxicity Snapshot

Toxic PartsAll above-ground plant parts including leaves, stems, flowers, and seeds contain toxic compounds

Exposure RoutePrimary exposure route is ingestion; direct skin contact with plant sap may also cause localized photosensitive reactions

Toxic CompoundsFuranocoumarins

First Aid & Prevention

First 30 Minutes

• Move the exposed animal to a fully shaded, sun-free area immediately to prevent worsening photosensitivity
• Gently remove any remaining plant material from the animal's mouth, fur, or exposed skin
• Rinse all skin areas that contacted the plant with cool, clean running water to reduce residual irritants

Contact Vet Immediately

• If the animal has ingested any quantity of Spring Parsley, regardless of current symptoms
• If signs of sunburn, blistering, itching, or dermatitis appear within 24 hours of exposure
• If the animal shows signs of distress, pain, or swelling of affected skin areas

Prevention

• Eradicate Spring Parsley from pastures, yards, and other areas accessible to pets and grazing animals
• Avoid allowing pets or livestock to graze in areas where this plant is known to grow, especially on sunny days
• Learn to identify Spring Parsley to avoid accidental exposure during hikes, foraging, or pasture inspections

Treatment & Prognosis

• Veterinarians may administer activated charcoal to reduce toxin absorption if ingestion occurred within 2 hours
• Topical corticosteroids and oral antihistamines may be prescribed to reduce inflammation, itching, and discomfort
• Affected animals should be kept completely out of direct sunlight for 7 to 14 days until furanocoumarins are fully metabolized

Emergency? Open PlantFun for real-time AI guidanceGet App

Professional Toxicology

Scientific NameCymopterus watsonii

AliasesWatson's Springparsley

Toxicity Grade

HumansLow

CatsLow

DogsLow

HorsesLow

Target Organs

Skin (epidermis, dermis)Oral mucous membranes (rare, with high ingestion volumes)

Mechanism of Action

• Furanocoumarins absorbed via ingestion or skin contact react with ultraviolet light from sun exposure, causing oxidative tissue damage to skin cells that presents as sunburn or dermatitis

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: May develop moderate photosensitivity and dermatitis if they ingest significant quantities while grazing

Sheep: Low risk of mild photosensitive skin reactions after consumption; severe toxicosis has not been reported

Goats: Minimal risk of mild localized skin irritation following contact or ingestion of small amounts of the plant

Confusion Risk

The following plants look similar and may be confused:

Common Garden Parsley Petroselinum crispum

Both have feathery divided green foliage; Spring Parsley is smaller (under 30cm tall) and grows in dry rocky wild habitats, while garden parsley is cultivated, has broader leaflets, and grows up to 60cm tall

Wild Carrot (Queen Anne's Lace) Daucus carota

Both produce umbrella-shaped white flower clusters; Spring Parsley lacks the characteristic small dark central flower in its umbel that distinguishes wild carrot, and has a shorter, smoother stem

Use PlantFun to scan and avoid misidentificationGet App

Related Toxic Plants

Heracleum mantegazzianum

Download PlantFun App

Identify, grow and care for plants effectively!

Instant Plant ID

Take a photo to quickly identify plants.

Smart Care Reminders

Generate watering and care schedules.

Toxicity & Disease Diagnosis

Identify toxic plants and pests with treatment advice.

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.

View Full Plant Wiki