Can Greek Tortoises eat ZZ Plant?

Why

[confidence: high] [source: The Tortoise Table plant database, exotic reptile veterinarian toxicology review, and peer-reviewed herpetology or veterinary toxicology journal covering oxalate-containing plants in chelonians] ZZ Plant (Zamioculcas zamiifolia) contains calcium oxalate crystals throughout all plant parts, which can cause oral irritation, swelling, and gastrointestinal distress in Greek Tortoises; all parts are considered toxic and should be strictly avoided. The calcium oxalate raphides pose a direct toxicity mechanism relevant to herbivorous reptiles.