Lisianthus

Lisianthus is a flower the ASPCA Animal Poison Control Center describes as non-toxic. Four articles between 2016 and 2022 name it among pet-safe bouquet flowers, and the 2020 one says directly that "Lisianthus (Eustoma grandiflora) … are another non-toxic plant that will add to a bouquet." All four give the scientific name, so there is no doubt which flower is meant.

It helps to know the grain of that evidence. This verdict comes from ASPCA bouquet guidance, not from the organisation’s species-level toxic plant list, so it is one step weaker than a listed species. Those articles also add that while these plants are considered safe, any ingestion may cause mild stomach upset because they are not part of a pet’s normal diet.

Both frilly, rose-like double-bloom varieties and simple single-bloom varieties are sold, often in bouquets and arrangements from florists. The petals are thin and shed easily, so clear away fallen petals the same day, and keep vase water — often treated with florist preservatives — out of reach.

Look at what else came in the bundle. If even one lily is mixed in, that is a far greater risk than the lisianthus, so check the bouquet as soon as it arrives.

A large mouthful may bring mild vomiting or loose stool. If that repeats or your cat seems listless, contact your vet.