Ageratos

Ageratos is a genus of flowering plants in the family Asteraceae, commonly known as ageratums or floss flowers. The genus is native to tropical and subtropical regions of the Americas, with a center of diversity in Mexico and Central America. Ageratos are herbaceous plants, typically annuals or short-lived perennials, that grow to a height of 15 to 60 centimeters. They have opposite, toothed leaves and produce clusters of small, fluffy flower heads, typically in shades of blue, purple, pink, or white. The name "ageratum" comes from the Greek word "ageratos," meaning "ageless," referring to the flowers' ability to retain their color and form for a long time after being picked.

Several species are cultivated as ornamental plants, with Ageratum houstonianum being the most widely known and grown. This species is popular for its abundant blooms and is often used in bedding, borders, and containers. It is known for its vibrant blue, purple, and white flowers that attract pollinators like butterflies and bees. While many cultivars exist, they all share the characteristic fluffy appearance of the flower heads. Ageratos are relatively easy to grow, preferring full sun to partial shade and well-drained soil. They are also known for their prolific seeding, which can lead to them naturalizing in suitable climates. Some species may have medicinal uses in traditional folk medicine, although these are not widely recognized in conventional practices.