Cretan brake fern Toxic?

Updated 2026-03-06| 4 min read| 1,829 found this helpful

No peer-reviewed scientific literature has documented toxicity associated with Cretan brake fern to date

Despite low risk, the plant is not suitable for use as feed for any pets, livestock, or horses

Many closely related Pteris fern species carry confirmed toxicity risks, so accurate plant identification is critical

FAQ

Is Cretan brake fern toxic to Humans?

No documented adverse symptoms from incidental exposure; mild gastrointestinal discomfort may occur in rare cases of large ingestion (Non-toxic)

Is Cretan brake fern toxic to Cats?

No reported toxic reactions; mild digestive upset (vomiting, soft stool) may occur if large volumes are consumed (Non-toxic)

Is Cretan brake fern toxic to Dogs?

No reported toxic reactions; mild digestive upset (vomiting, soft stool) may occur if large volumes are consumed (Non-toxic)

Is Cretan brake fern toxic to Horses?

No reported toxic reactions; mild digestive upset may occur if large volumes are consumed (Non-toxic)

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Toxicity Details

Humans

Non-toxic

No documented adverse symptoms from incidental exposure; mild gastrointestinal discomfort may occur in rare cases of large ingestion

Cats

Non-toxic

No reported toxic reactions; mild digestive upset (vomiting, soft stool) may occur if large volumes are consumed

Dogs

Non-toxic

No reported toxic reactions; mild digestive upset (vomiting, soft stool) may occur if large volumes are consumed

Horses

Non-toxic

No reported toxic reactions; mild digestive upset may occur if large volumes are consumed

Toxicity Snapshot

Toxic PartsNo toxic plant parts identified in available research; the entire plant is presumed non-toxic, though not approved for feed use

Exposure RouteOral ingestion is the only confirmed potential exposure route; skin contact is not associated with known adverse effects

Toxic CompoundsNo toxic phytochemicals specific to this species have been documented in peer-reviewed research

First Aid & Prevention

First 30 Minutes

• Rinse the mouth of the exposed human or animal with clean water immediately after large ingestion
• Monitor for mild gastrointestinal discomfort for 24 hours post-exposure
• Collect a sample of the ingested plant for formal identification if symptoms develop

Contact Vet Immediately

• Persistent vomiting, diarrhea, or lethargy occurs after ingestion
• You cannot confirm the plant is Cretan brake fern and suspect it may be a toxic related species
• A large volume of the plant was consumed by a small pet, foal, or young child

Prevention

• Accurately identify all ferns in areas accessible to pets, livestock, and small children
• Never intentionally feed Cretan brake fern to any pet, livestock, or horse
• Label decorative household ferns to avoid misidentification with toxic related species

Treatment & Prognosis

• Administer supportive care including fluids for mild dehydration if gastrointestinal symptoms occur
• Confirm plant identification to rule out exposure to more toxic related Pteris species
• Provide symptomatic care for any rare allergic reactions if they develop

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Professional Toxicology

Scientific NamePteris cretica L.

AliasesCretan brake、Pteris nervosa Thunb.、Pteris oligophylla Viv.

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No target organs for toxicity have been identified for this species in available research

Mechanism of Action

• No toxic mechanism of action has been identified for this species, as no toxicity has been recorded in published studies

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep, and goats: No documented toxicity, but intentional feeding as forage is not recommended due to lack of long-term safety data

Small companion mammals (rabbits, guinea pigs, hamsters): No reported adverse reactions, but ingestion of large quantities may cause mild digestive upset

Confusion Risk

The following plants look similar and may be confused:

Other Pteris fern species Pteris spp.

Many Pteris species are visually similar to Cretan brake fern; some related species have confirmed toxicity, so verify leaf morphology and spore patterning to confirm identification

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Related Toxic Plants

Bracken Fern

Pteridium aquilinum

Severe toxicity, linked to cancer and organ damage in livestock and humans

Chinese Brake Fern

Pteris vittata

Moderate toxicity, accumulates high levels of toxic arsenic from soil

Poison Rock Fern

Cheilanthes sieberi

High toxicity, causes neurological and gastrointestinal damage in grazing livestock

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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.