Pedaliaceae: the sesame family of flowering plants

Characteristics

Plants in this family typically bear simple, often opposite leaves and conspicuous tubular flowers formed by united petals. The floral structure and fruit type are important for identification: many species produce a dry capsule or a hooked, two-part fruit that aids seed dispersal. Seeds are frequently rich in oil and may be flat and small, as in cultivated sesame.

Taxonomy and distribution

Pedaliaceae has been treated differently over time in plant classification systems; older sources placed it with groups like the Scrophulariales, while modern systems ordinarily position it within the order Lamiales. The family comprises about a dozen genera and several dozen species, with most diversity in Africa and adjacent regions, and some species naturalized elsewhere.

Uses and importance

The best-known member is cultivated sesame (sesame, Sesamum spp.), grown for edible seeds and oil valued in cooking and traditional cuisines worldwide. Other species are used medicinally or ornamentally; for example, certain genera produce tubercles or hooked fruits used in herbal remedies and folk practices. The high oil content of seeds makes them important in food, cosmetics and industrial applications.

Notable features and distinctions

Distinctive traits that separate Pedaliaceae from similar families include the often sticky or mucilaginous seed coats, specialized fruit morphologies (including spiny or hooked capsules), and specific floral characters within Lamiales. Some genera have evolved mechanisms for animal-assisted seed dispersal, while others rely on dehiscence or human collection.

Further reading

For general treatments and species lists consult regional floras and modern plant databases. Short summaries and species pages are available through the linked resources above for readers seeking more detailed botanical descriptions, cultivation advice, or economic information.