"Mildly toxic" is a relative term. It refers to plants that produce a minor digestive reaction, such as diarrhea or vomiting, but not serious illness or death when eaten.
According to SFGate, certain types of lilies are toxic to humans as well as animals, and should not be consumed under any circumstances. In some instances, consumption can land a person in the hospital or lead to death.
All parts of these plants are toxic, due to the presence of alkaloids. Grazing animals, such as sheep and cattle, may be affected and human fatalities have occurred. Delphinium genus: Also known as larkspur. Contains the alkaloid delsoline. Young plants and seeds are poisonous, causing nausea, muscle twitches, paralysis, and often death.
Most plants that are poisonous to humans will also be poisonous to pets, but they may affect animals differently. Easter lilies are known to be extremely toxic to cats, causing liver failure if not treated immediately, whereas dogs are not as affected.
Although peace lilies are not true lilies, they are still toxic to humans and pets. The peace lily, or Spathiphyllum, is not a member of the Liliaceae family, and therefore not a true lily. There are many varieties of peace lily, with the "Mauna Loa" lily being one of the most common indoor ornamentals.
Lilies. Lilies are highly toxic to humans, cats, dogs and goats. The leaves and flowers are where the poison is concentrated, and ingestion can lead to kidney damage. Lily-of-the-Valley is especially toxic as it, like oleander, contains cardiac glycosides and saponins. Another toxic lily is the Peace Lily, also known as the Mauna Loa Peace Lily.
For instance, calla lilies can be fatal if ingested by a baby. Easter, Tiger, Rumbrum, Day and Asian lilies are also dangerous to humans, if ingested. How it affects humans: If ingested, lilies can cause vomiting, blurred vision, headaches as well as skin irritation. How it affects animals: Lilies can be more toxic to cats than to dogs. Cats ...
While true lily species are numerous, there are also many plants with lily in their name that are not true lilies, such as calla lily, lily of the valley among others. Although you specifically asked about human toxicity, some lily species are highly toxic to cats, which can cause acute renal failure.
As an RN I have found that all plants that are considered poisonous to animals and humans are not consumed in the amount that would do harm. Poor old Poinsetta gets such a bad rap at Christmas---POISON POISON--yep, it is going to give you 1 hellava bellyache if you eat a cup or 3 of the leaves--but kill you ??? Nah.
Read this article to know about some most poisonous plants to humans. Also, have a look at the plants which keep away mosquitoes. Most of the time we say that plants are good for the earth and environment, yes they are but almost every plant have toxins for the protection against predators. But most of them are not harmful to the humans.