Heterotheca

Heterotheca is a genus of flowering plants in the family Asteraceae, native to the Mediterranean region, including parts of Europe, North Africa, and the Middle East. The genus is characterized by its unique inflorescence, which is a compound cyme, meaning it consists of a central flower surrounded by a ring of smaller flowers. This distinctive structure is often referred to as a "false flower" or "pseudanthium." The central flower is typically larger and more showy, while the surrounding flowers are smaller and less prominent. The genus includes several species, with the most well-known being Heterotheca villosa, which is often cultivated for its ornamental value. The leaves of Heterotheca species are typically narrow and linear, and the plants are often evergreen or semi-evergreen. The genus is named for its heterothecal flowers, which are flowers that have different numbers of stamens and pistils. This is a rare characteristic among Asteraceae, and it is one of the reasons why Heterotheca is of interest to botanists and horticulturists alike. Despite its limited distribution, Heterotheca has gained popularity in horticulture due to its unique appearance and relatively low maintenance requirements. It is often grown in rock gardens, alpine plantings, and other similar settings where its distinctive inflorescence can be appreciated.