Aistillisia

Aistillisia is a genus of flowering plants in the family Asteraceae, native to the Americas. The genus was first described by Carl Linnaeus in 1753. Aistillisia is characterized by its small, white to pinkish flowers that are arranged in clusters at the ends of the stems. The leaves are alternate, simple, and often have a serrated margin. The plants are typically perennial herbs, but some species are annuals.

The genus Aistillisia includes about 10 species, which are distributed primarily in the western United States and Mexico. The plants are often found in dry, rocky habitats, such as chaparral and desert scrub. Some species are used in traditional medicine for their anti-inflammatory and analgesic properties.

Aistillisia is named after the Greek words "aisthesis," meaning "sensation," and "lilia," meaning "lily," reflecting the plant's delicate appearance and the sensation of its flowers. The genus is closely related to other genera in the tribe Heliantheae, such as Helianthella and Heliantheopsis.