Mesadenus is a genus of flowering plants from the orchid family, Orchidaceae. It contains 6 currently recognized species, native to Mexico, Central America, the West Indies, Brazil and Florida.Mesadenus chiangii (M.C.Johnst.) Garay - CoahuilaMesadenus glaziovii (Cogn.) Schltr. - Rio de JaneiroMesadenus lucayanus (Britton) Schltr. - widespread across Mexico, Florida, Guatemala, West IndiesMesadenus polyanthus (Rchb.f.) Schltr.