Psylliaceae

Psylliaceae is a small family of flowering plants in the order Lamiales. This family is often included within the Plantaginaceae family, but some sources continue to recognize it as a distinct group. The family contains only a few genera, with Psyllium being the most well-known. These plants are herbaceous and are native to Europe, Asia, and Africa.

The most significant member of Psylliaceae is Plantago ovata, commonly known as psyllium. Psyllium seeds and husks are widely used as a dietary fiber supplement. They are known for their mucilaginous properties, meaning they absorb water and swell, forming a gel. This characteristic makes them effective in treating constipation and other digestive issues. Psyllium is also used in some industrial applications due to its gelling capabilities.

While psyllium is the primary focus, other genera within Psylliaceae, such as Digitalis, were historically recognized but are now largely placed within Plantaginaceae. Research into the evolutionary relationships of these plants continues, and the taxonomic classification of Psylliaceae may evolve as new data emerges. The plants in this family typically have simple leaves and small, inconspicuous flowers arranged in spikes or heads. Their reproductive strategies vary, but many rely on wind pollination.