Pothos Pretty, Popular, Problematic Plant: Pothos (Devil's Ivy) Why it's toxic: Pothos contains calcium oxalate crystals that cause irritation when chewed. What happens: Mouth and tongue pain Drooling Catha edulis seeds AllStar Mix GardenShaman.eu Before you bring home those new blooms, make sure they're pup approved! Many common house plants can be toxic if your dog decides to do a little "taste test." Save this guide for What attracts spider mites to croton plants and how to treat them? How to draw a spider lily Flower drawing The Best Fake Snake Plant With Comparison Photos Apartment Therapy