how is Brassia and Comesperma connected?
Brassia Brassia is a genus of orchids classified in the Oncidiinae subtribe. It is native to Mexico, Central America, the West Indies, and northern South America, with one species ("B. caudata") extending into Florida.
Gustavia (plant) Gustavia is a genus of flowering plants of Lecythidaceae family described by Linnaeus in 1775. It is native to tropical Central America and South America. Many of the species are threatened; some are critically endangered "Gustavia superba", though, is actually abundant in re-growing secondary forests. It grows in northern South America, from Panama south through the Andes as far as Ecuador, and along the Caribbean coast and in the Amazon basin.