Tilansaceae

Tilansaceae is a small family of flowering plants that belongs to the order Rosales. The family consists of a single genus, *Tilanus*, which includes only one known species, *Tilanus elegans*, native to the high-altitude regions of the Andes in South America. This plant is characterized by its unique and delicate appearance, with slender stems, small leaves, and clusters of tiny white or pale pink flowers.

The taxonomy of Tilansaceae has been a subject of debate among botanists. Traditionally, *Tilanus elegans* was classified within the Rosaceae family due to its morphological similarities, such as the structure of its flowers and fruits. However, molecular phylogenetic studies have suggested that it is more closely related to certain groups within the Rosales order, warranting its placement in a separate family. The family name, Tilansaceae, was proposed in 2003 to reflect this distinct evolutionary lineage.

*Tilanus elegans* thrives in cold, alpine environments, often growing in rocky crevices or on steep slopes. Its adaptation to such harsh conditions includes a low-growing, mat-forming habit and the ability to survive periods of frost. The plant’s flowers are pollinated by insects, and its seeds are dispersed by wind or water.

Due to its limited distribution and specialized habitat, *Tilanus elegans* is considered a rare and potentially vulnerable species. Conservation efforts are important to protect its natural habitat from threats such as climate change, habitat destruction, and invasive species. Research on Tilansaceae remains limited, and further study could provide valuable insights into its evolutionary history and ecological role.