Gymnocoronis

Gymnocoronis is a small genus of flowering plants in the family Asteraceae, subfamily Asteroideae. It is native to South America, with species found in Argentina, Brazil, Paraguay, and Uruguay. The genus is characterized by its herbaceous perennial nature and its distinctive inflorescences.

The name Gymnocoronis is derived from the Greek words "gymnos" meaning naked and "korone" meaning crown, referring to the appearance of the flower heads where the pappus bristles are exposed. Plants in this genus typically grow to a height of 30 to 100 centimeters. They have alternate, simple leaves that are often toothed or lobed. The flower heads are usually borne in panicles or corymbs and consist of numerous small, white to pale pink ray florets and disk florets. The fruit is an achene.

One of the most well-known species is Gymnocoronis spilanthoides, commonly known as creeping gloryweed or simply Gymnocoronis. This species is often found in wetlands, marshes, and along riverbanks. It can spread vegetatively and has been introduced to other parts of the world, where it can sometimes be considered an invasive weed due to its rapid growth and ability to colonize disturbed habitats. Despite its weed potential in some regions, Gymnocoronis species play a role in their native ecosystems, providing habitat and food for insects. Research into the specific ecological roles and potential uses of Gymnocoronis species is ongoing.