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These plants are found not just in gardens, but in the house, close to our small children and pets. If that is the case we should at least be aware so we can take necessary measures.

One of the most common and dangerous indoor plants is the Dieffenbachia, the sap of which contains strychnine, a poison that in high doses can be lethal. Swallowing parts of the plant causes swelling in the mouth and throat. But such ingestion by a child or pet is unlikely because its leaves are large and both look and feel leathery.

The sap of all species of Euphorbia is milky and flows readily when any part of the plant is snapped. It is poisonous and a skin irritant. The most common in our homes is Euphorbia pulcherrima, or poinsettia.

Other toxic household plants are tree datura, all parts of which are toxic, Amaryllis, asparagus plants and philodendron. But poisoning by ingestion is rare, and in general wearing gloves is enough to protect yourself from getting hives.

Particularly risky, especially for children, are plants with decorative fruits or berries with bright colors. Take the cases of Capsicum annuum (jalapeno peppers) and Solanum capsicastrum, known as the false Jerusalem cherry. These are raised because of their small, decorative fruit, but they are also very toxic and tempting for children. The best solution is careful teaching suited to the age of the child or children in your home.