26. Eumachia cephalantha (Müll. Arg.) Delprete & J.H. Kirkbr. in J. Bot. Res. Inst. Texas 9: 77. 2015.

Ξ Mapouria cephalantha Müll. Arg. in Flora 59: 495, 497. 1876 . Ξ Uragoga cephalantha (Müll. Arg.) Kuntze, Revis. Gen. Pl. 2: 959. 1891 . Ξ Psychotria cephalantha (Müll. Arg.) Standl. in Publ. Field Mus. Nat. Hist., Bot. Ser. 11: 235. 1936 . Ξ Margaritopsis cephalantha (Müll. Arg.) C.M. Taylor in Syst. Geogr. Pl. 75: 171. 2005 .

Lectotypus (designated by ANDERSSON 1992: 138): BRAZIL. Minas Gerais: prope Lagoa Santa, s.d., Warming s.n. (C; isolecto-: G [G00300254]!, F-667820 image seen, P [P02285215] image seen) .

Notes. – This is the most widely distributed Neotropical species of Eumachia . It is found in Amazonian Colombia, Brazil, Peru, and Bolivia, and outside Amazonia in eastern Brazil and perhaps also Paraguay (TAYLOR, 2005). See TAYLOR (2005) and DELPRETE & KIRKBRIDE (2015) for synonymy.