Coleus mannii Hook. f., J. Proc. Linn. Soc., Bot. 7: 211. 1864. = Coleus giorgii De Wild., Bol. Soc. Ibér. Ci. Nat. 19: 120. 1920. Type: DR. Congo, Likimi, S. De Giorgi 1511 (lectotype BR [BR 0000021453984], designated by Champluvier & Dowsett-Lemaire [1999]). Type. Cameroon, Mt Cameroon, 1862, G. Mann 1967 (holotype K [K 000025010]). Description. Paton (2022: 51). Distribution. W Tropical Africa to DR. Congo and Sudan. Habitat and ecology. Swamps, riparian forest, savannah on wet soil, often near watercourses and ponds; 400–1200 m elev. Additional specimens. DR. Congo, Bas-Congo, Mandzambe, s. d., J. Claessens 326 (BR); Kasaï: Kebiya, Dec 1951, Flamigni 10350 (BR); Bokoro, 22 May 1948, Jans 695 (BR); Luluabourg [Kananga], 1930, H. Vanderyst 21130 & 21135 (BR); Forestier central, Yaekama, territ. Isangi, 7 Feb 1959, P. Bamps 337 (BR); Avakubi, 9 Jan 1914, J. Bequaert 1847 (BR); Ligasa-Mangala, 9 Dec 1956, C. Evrard 2045 (BR); Banzingi, 22 Jul 1954, G. F. de Witte 10739 (BR); Marais de la Bukotsa, 27 Nov 1952, H. Fredericq in G. F. de Witte 8421 (BR); 6 km W de Yangambi, 6 Jul 1938, J. Louis 10212 (BR, P); Ubangi-Uele, Dungu, rivière Nambasa, Oct 1936, A. M. De Graer 749 (BR); Entre Banzyville [Mobayi-Mbongo] et Pambwa, 14 Oct 1954, C. Evrard 109 bis (BR); Entre Libenge et Gemena, Dec 1930, J. Lebrun 1841 (BR); Dida, Gombari, 22 Dec 1906, F. Seret 711 (BR); Lacs Edouard et Kivu, Virunga, Bakotsa, près confluent Byangolo-Molidi, 23 Sep 1954, G. F. de Witte 11129 (BR); Sinamboro, affl. droit Balembi, 4 Feb 1955, G. F. de Witte 11668 (BR).

Published as part of Meerts, Pierre J. & Paton, Alan J., 2024, The genus Coleus (Lamiaceae) in Central Africa (Democratic Republic of the Congo, Rwanda, Burundi), with the description of 15 new species, pp. 71-178 in PhytoKeys 246 on pages 71-178, DOI: 10.3897/phytokeys.246.129476