Gnetales

Gnetales is an order of gymnosperms that includes genera such as Ephedra, Gnetum, and Welwitschia, representing highly specialized evolutionary lineages. Members produce alkaloids, flavonoids, stilbenes, and unique phenolic compounds. In biomedical research, Gnetales is significant for its neuroactive, cardiovascular, antioxidant, and anti-inflammatory properties, particularly from ephedrine-related compounds and stilbenes. The order is also crucial for understanding convergent evolution between gymnosperms and angiosperms in vascular plant chemistry.