Is Monosolenium tenerum toxic to cats?

Mildly. The ASPCA lists monosolenium tenerum as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. Monosolenium tenerum is not individually listed in the ASPCA Toxic and Non-Toxic Plants database, and liverworts as a group are not classified there; treat as uncertain and verify with a vet before assuming it is safe around pets that may chew aquarium plants. No specific toxic principle is documented, but absence of an ASPCA listing is not a safety guarantee.

Monosolenium tenerum is not individually listed in the ASPCA Toxic and Non-Toxic Plants database, and liverworts as a group are not classified there; treat as uncertain and verify with a vet before assuming it is safe around pets that may chew aquarium plants. No specific toxic principle is documented, but absence of an ASPCA listing is not a safety guarantee. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your cat has had access to monosolenium tenerum.

Stay calm. Remove any plant from your cat's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice; a leaf or photo helps the vet treat it correctly.

The ASPCA classification Growli uses applies to both cats and dogs: Monosolenium tenerum is mildly toxic to dogs as well. See the full monosolenium tenerum pet-safety guide for both species.

For a similar look without the risk, see the best cats-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.