Are Calla Lily Stems Poisonous?

Toxicity

• Calla lily stems are poisonous. So are the leaves, flowers and roots. In fact, the entire plant is poisonous if ingested. The roots are the most dangerous, but all parts of a calla lily contain oxalic acid, which can cause adverse reactions in people and animals if consumed. The plant can be safely handled, but do not rub your eyes if you get plant sap on your skin, as it can irritate the eyes.

Symptoms

• Symptoms of calla lily poisoning begin at the mouth with a burning sensation on the inside of the mouth, tongue, lips and throat. The mouth and tongue may turn red and swell up. Nausea, diarrhea and vomiting may follow. In severe cases, the person may have trouble swallowing. If oxalic acid from the plant gets in the eyes, they will become red, swollen and painful. Animals have the same reaction to the toxin and often drool.

Severity

• In most cases, not enough of the plant is consumed to create a life-threatening health event in adults, according to the University of Maryland Medical Center website. Still, young children and livestock or pets may be vulnerable to deadly reactions if they consume the plant, and the roots in particular.

Treatment

• If the person or animal is able to swallow, give them some milk and then call your local poison control center or veterinarians office right away. These plants are often part of a floral bouquet -- some are even grown indoors as houseplants -- so it's best to be aware of their hazards and subsequently, keep them far away from children and pets.