Snake plant (Sansevieria / Dracaena trifasciata) causes vomiting and diarrhea due to saponins.
A very common houseplant — fortunately the bitter taste discourages most dogs from eating much.
Snake plant contains saponins which irritate the gastrointestinal mucosa and create a soapy froth when mixed with stomach contents. This typically causes vomiting that limits further absorption.
Sources
Small amounts cause vomiting and diarrhea that usually self-resolves; large ingestions warrant vet advice.