Genus Horneophyton is a type of extinct plant that lived during the Devonian period. The name Horneophyton is frequently used to describe this group of plants, which are commonly referred to as the "horned plants." However, there are several synonyms that are also used to describe Genus Horneophyton, including Hornea, Pachytheca, and Serrana. These names have been used interchangeably in scientific literature and serve as alternative designations for the same group of plants. While the precise classification of this genus is debated among researchers, its unique characteristics and importance in the evolutionary history of plants make it an intriguing subject for further study.