{"id":"philodendron","common_names":["Philodendron","Heartleaf Philodendron","Sweetheart Plant","Cordatum"],"scientific_name":"Philodendron hederaceum","urls":{"plant":"https://verdapaw.com/plants/philodendron","cats":"https://verdapaw.com/plants/philodendron/cats","dogs":"https://verdapaw.com/plants/philodendron/dogs","data":"https://verdapaw.com/plants/philodendron/data.json"},"toxicity":{"cat":{"severity":2,"grade":"S2 Irritant","verdict_sentence":"Heartleaf philodendron is toxic to cats (S2 Irritant): its insoluble calcium oxalate crystals cause oral pain, swelling, drooling, and vomiting, but ingestion is rarely life-threatening.","toxic_principles":["insoluble calcium oxalates"],"toxic_parts":[],"symptoms":[{"sign":"oral irritation; pain and swelling of mouth, tongue and lips","onset":"not specified in source"},{"sign":"excessive drooling, gagging","onset":"not specified in source"},{"sign":"vomiting","onset":"not specified in source"},{"sign":"difficulty swallowing","onset":"not specified in source"},{"sign":"in rare instances, severe throat swelling with breathing difficulty","onset":"not specified in source"}],"sources":[{"url":"https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants/heartleaf-philodendron","name":"ASPCA","accessed_at":"2026-08-21"},{"url":"https://www.petpoisonhelpline.com/poison/philodendron/","name":"PPH","accessed_at":"2026-08-21"}],"reviewed_by":"Zhe Li","reviewed_at":"2026-09-30"},"dog":{"severity":2,"grade":"S2 Irritant","verdict_sentence":"Heartleaf philodendron is toxic to dogs (S2 Irritant): its insoluble calcium oxalate crystals cause oral pain, swelling, drooling, and vomiting, but ingestion is rarely life-threatening.","toxic_principles":["insoluble calcium oxalates"],"toxic_parts":[],"symptoms":[{"sign":"oral irritation; pain and swelling of mouth, tongue and lips","onset":"not specified in source"},{"sign":"excessive drooling, gagging","onset":"not specified in source"},{"sign":"vomiting","onset":"not specified in source"},{"sign":"difficulty swallowing","onset":"not specified in source"},{"sign":"in rare instances, severe throat swelling with breathing difficulty","onset":"not specified in source"}],"sources":[{"url":"https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants/heartleaf-philodendron","name":"ASPCA","accessed_at":"2026-09-30"},{"url":"https://www.petpoisonhelpline.com/poison/philodendron/","name":"PPH","accessed_at":"2026-09-30"}],"reviewed_by":"Zhe Li","reviewed_at":"2026-09-30"}},"license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/","terms":"Free to reuse with attribution to Verdapaw and a link to the plant page."},"cite_as":"Verdapaw Plant × Pet Safety Index, verdapaw.com/plants/philodendron, reviewed 2026-09-30"}