Oleisia

Oleisia is a genus of plants in the family Asteraceae. This genus is native to North America, with most species found in western Canada and the western United States. Oleisia species are typically perennial herbs, though some may appear as subshrubs. They are characterized by their daisy-like flowers, which are usually white or pale yellow, with a prominent central disk. The leaves are generally lance-shaped and can be smooth or toothed along the margins.

These plants are often found in open, sunny habitats such as meadows, prairies, and disturbed areas. They are adapted to a range of soil conditions but generally prefer well-drained soils. The flowering period for Oleisia varies depending on the species and location, but it commonly occurs from late spring through summer. Pollinators, such as bees and butterflies, are attracted to the flowers.

While not widely cultivated, some species of Oleisia may be used in native plant gardening or for ecological restoration projects. Their resilience and ability to thrive in less fertile conditions make them valuable for certain landscaping applications. Research into the genus often focuses on its ecological role, genetic diversity, and potential medicinal properties, though extensive studies are limited. The taxonomy of Oleisia has been subject to revision over time, with some species formerly classified under other genera.