Grosourdya is a genus of flowering plants from the orchid family, Orchidaceae. As of May 2022, it contains 26 known species, native to Southeast Asia.

• Grosourdya appendiculata (Blume) Rchb.f. - widespread from Hainan to the Andaman Islands to the Philippines and Maluku
• Grosourdya bicornuta J.J.Wood & A.L.Lamb - Sabah
• Grosourdya bigibba (Schltr.) Kocyan & Schuit.
• Grosourdya callifera Seidenf. - Thailand
• Grosourdya ciliata (Ridl.) Kocyan & Schuit.
• Grosourdya decipiens (J.J.Sm.) Kocyan & Schuit.
• Grosourdya emarginata (Blume) Rchb.f.
• Grosourdya fasciculata (Carr) Kocyan & Schuit.
• Grosourdya incurvicalcar (J.J.Sm.) Garay - Java, Peninsular Malaysia, Sulawesi
• Grosourdya leytensis (Ames) Kocyan & Schuit.
• Grosourdya lobata (J.J.Wood & A.L.Lamb) Kocyan & Schuit.
• Grosourdya milneri P.O'Byrne, Gokusing & J.J.Wood
• Grosourdya mindanaensis (Ames) Kocyan & Schuit.
• Grosourdya minutiflora (Ridl.) Garay - Pahang
• Grosourdya minutissima P.T.Ong & P.O'Byrne
• Grosourdya multistrata P.O'Byrne, J.J.Verm. & S.M.L.Lee
• Grosourdya muscosa (Rolfe) Garay - Peninsular Malaysia, Thailand, Andaman Islands
• Grosourdya myosurus (Ridl.) Kocyan & Schuit.
• Grosourdya nitida (Seidenf.) Kocyan & Schuit.
• Grosourdya pulvinifera (Schltr.) Garay - Sabah, Sulawesi
• Grosourdya quinquelobata (Schltr.) Garay - Sulawesi
• Grosourdya reflexicalcar P.O'Byrne & J.J.Verm.
• Grosourdya tripercus (Ames) Garay - Leyte
• Grosourdya urunensis J.J.Wood, C.L.Chan & A.L.Lamb - Sabah
• Grosourdya vietnamica (Aver.) Kumar & S.W.Gale
• Grosourdya zollingeri (Rchb.f.) Rchb.f. - Java, Maluku

...