Joitinnea

Joitinnea is a genus of flowering plants in the family Asteraceae. The genus is native to South America, with most species found in Brazil and Argentina. Joitinnea species are typically herbaceous perennials, growing from rhizomes. They have a rosette of basal leaves and produce erect stems bearing solitary flower heads. The flower heads are composed of ray florets and disc florets, characteristic of the Asteraceae family. The ray florets are often brightly colored, while the disc florets are typically yellow or brown.

The exact taxonomic placement of Joitinnea has been subject to revision. Historically, it has been classified in various tribes within Asteraceae. Current research suggests its closest relatives are within the tribe Heliantheae. The genus name honors the Finnish botanist J. W. Joitinnea.

Several species within the Joitinnea genus are recognized, though the precise number can vary depending on taxonomic interpretations. These species are often found in open, disturbed habitats, such as grasslands and roadsides. Their ecological roles are not extensively documented, but like other Asteraceae, they likely contribute to pollination networks and serve as food sources for herbivores. Further research is needed to fully understand the biology and ecological significance of Joitinnea.