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. 1. \n* Mesadenus chiangii (M.C.Johnst.) Garay - Coahuila 2. \n* Mesadenus glaziovii (Cogn.) Schltr. - Rio de Janeiro 3. \n* Mesadenus lucayanus (Britton) Schltr. - widespread across Mexico, Florida, Guatemala, West Indies 4. \n* Mesadenus polyanthus (Rchb.f.) Schltr. - Mexico, Belize 5. \n* Mesadenus rhombiglossus (Pabst) Garay - Minas Gerais 6. \n* Mesadenus tenuissimus (L.O.Williams) Garay - Morelos