Cyclophyllum is a genus of flowering plants in the family Rubiaceae. Its natural range extends from New Guinea and northern Australia to many islands of the Pacific Ocean.

Species

, Plants of the World Online recognises 42 species, as follows: • Cyclophyllum baladense Guillaumin • Cyclophyllum balansae (Baill.) Guillaumin • Cyclophyllum barbatum (G.Forst.) N.Hallé & J.Florence • Cyclophyllum brevipes (Merr. & L.M.Perry) S.T.Reynolds & R.J.F.Hend. • Cyclophyllum calyculatum Guillaumin • Cyclophyllum cardiocarpum (Baill.) Guillaumin • Cyclophyllum caudatum (Valeton) A.P.Davis & Ruhsam • Cyclophyllum coprosmoides (F.Muell.) S.T.Reynolds & R.J.F.Hend. • Cyclophyllum costatum (C.T.White) S.T.Reynolds & R.J.F.Hend. • Cyclophyllum cymosum S.Moore • Cyclophyllum deplanchei Hook.f. • Cyclophyllum fragrans (Schltr. & K.Krause) Mouly • Cyclophyllum francii Guillaumin • Cyclophyllum guillauminianum Baum.-Bod. ex Mouly & Jeanson • Cyclophyllum henriettiae (Baill.) Guillaumin • Cyclophyllum jasminifolium Guillaumin & McKee • Cyclophyllum letocartiorum Mouly • Cyclophyllum longiflorum (Valeton) A.P.Davis & Ruhsam • Cyclophyllum longipetalum S.T.Reynolds & R.J.F.Hend. • Cyclophyllum lordbergense A.P.Davis • Cyclophyllum macphersonii Mouly • Cyclophyllum maritimum S.T.Reynolds & R.J.F.Hend. • Cyclophyllum memaoyaense Mouly • Cyclophyllum merrillianum Guillaumin • Cyclophyllum multiflorum S.T.Reynolds & R.J.F.Hend. • Cyclophyllum novoguineensis (Miq.) A.P.Davis & Ruhsam • Cyclophyllum pancheri (Baill.) Guillaumin • Cyclophyllum pindaiense Mouly • Cyclophyllum protractum S.T.Reynolds & R.J.F.Hend. • Cyclophyllum rectinervium (A.C.Sm.) A.C.Sm. & S.P.Darwin • Cyclophyllum rostellatum S.T.Reynolds & R.J.F.Hend. • Cyclophyllum sagittatum (Baill.) Guillaumin • Cyclophyllum schultzii (O.Schwarz) S.T.Reynolds & R.J.F.Hend. • Cyclophyllum sessilifolium (A.Gray) A.C.Sm. & S.P.Darwin • Cyclophyllum subsessile (Valeton) A.P.Davis • Cyclophyllum subulatum (Baill.) Guillaumin • Cyclophyllum tenuipes Guillaumin • Cyclophyllum tieaense Mouly • Cyclophyllum tiebaghiense Mouly & Jeanson • Cyclophyllum urophyllum (Valeton) A.P.Davis • Cyclophyllum valetonianum (S.Moore) A.P.Davis & Ruhsam • Cyclophyllum vieillardii (Baill.) Guillaumin