Gyrocaryum is a genus of plant that contains a single species: Gyrocaryum oppositifolium, which is endemic to Spain. A tiny light-blue flower blooms from the top of a thin stem. Soft hooks cover the stem from the base of the plant. The species was described from Sevilla in 1982. Today, it is only found in León. The population consists of less than 100 individuals with a continuous decline. This annual herb grows in herbaceous habitats. It can also be found on the edge of pine forests. The development of infrastructure, such as forestry roads and the construction of railways are major threats to this species. Trampling by humans and the introduction of competitive alien species are additonal threats. Collection for botanical and scientific purposes may also pose a threat. There are currently no conservation efforts in place, meaning this species could soon be extinct.