Can Hermann's Tortoises eat ZZ Plant?

Why

[confidence: high] [source: The Tortoise Table plant database, exotic reptile vet review, ASPCA toxic plant database cross-referenced with chelonian dietary guidelines] ZZ Plant (Zamioculcas zamiifolia) contains calcium oxalate crystals throughout all plant tissues, which can cause oral irritation, swelling, and gastrointestinal distress in Hermann's Tortoises. All parts of the plant are considered toxic and should be kept entirely out of reach of tortoises.