If an animal has eaten this plant, the ASPCA Animal Poison Control Center is (888) 426-4435, as printed on the record this page reproduces. A consultation fee may apply.
This page quotes a published document. Everything below in quotation marks is copied word for word from ASPCA Animal Poison Control Center: Jimmy Weed, published by ASPCA APCC and retrieved on 2026-09-16. The quotations are excerpts; the document itself is linked and is the authority. Nothing has been reworded.
According to the ASPCA Animal Poison Control Center record, Jimmy Weed (Haplopappus heterophyllus, family Asteraceae) is toxic to horses. Toxic principles: Trematol. Clinical signs listed: Tremors, cardiac damage. The record was retrieved on 2026-09-16 and is linked below.
The record
- Scientific name
- Haplopappus heterophyllus
- Family
- Asteraceae
- Additional common names
- Burrow Weed
- Toxicity
- Toxic to Horses
- Toxic principles
- Trematol
- Clinical signs
- Tremors, cardiac damage
Where this comes from
This is the ASPCA Animal Poison Control Center record for Jimmy Weed, at https://www.aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/jimmy-weed, retrieved on 2026-09-16. The fields above are the record’s own, shown without change. The ASPCA keeps the record current; the page here is a copy from that date.
This page is information, not a prescription. The right dose for an animal depends on its weight, its age, what else it is taking and what is wrong with it. Those are judgements only the veterinarian who has examined your animal can make. Ring your practice before giving anything.
Sources
- ASPCA Animal Poison Control Center: Jimmy WeedASPCA APCC · retrieved 2026-09-16
“Tremors, cardiac damage” (Clinical Signs)
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