The genus Coleus (Lamiaceae) in Central Africa (Democratic Republic of the Congo, Rwanda, Burundi), with the description of 15 new species Author Meerts, Pierre J. 0000-0003-4215-027X Meise Botanic Garden, Nieuwelaan 38, BE- 1860 Meise, Belgium & Université Libre de Bruxelles, Av. F. D. Roosevelt 50 CP 244, BE- 1050 Brussels, Belgium & Fédération Wallonie-Bruxelles, Service général de l’Enseignement supérieur et de la Recherche scientifique, Brussels, Belgium Author Paton, Alan J. 0000-0002-6052-6675 The Herbarium, Royal Botanic Gardens, Kew, Richmond TW 9 3 AB, UK text PhytoKeys 2024 2024-09-02 246 71 178 journal article 302074 10.3897/phytokeys.246.129476 b381880a-e0bb-4b02-ad0f-2f90a0b6c995 Coleus efoliatus De Wild. , Contr. Fl. Katanga : 173. & Ann. Soc. Sci. Bruxelles 41 (2): 47. 1921 . Plectranthus efoliatus (De Wild.) A. J. Paton , Fl. Trop. E. Afr., Lamiac.: 289. 2009 . Type: DR. Congo , Welgelegen, 6 Jun 1912 , J. Bequaert 486 ( lectotype BR [ BR 0000006261856 ], designated by Paton et al. [2009] ). = Plectranthus leviculus N. E. Br. , Bull. Misc. Inform. Kew 1921: 296. 1921 . Type: DR. Congo , Elisabethville [Lubumbashi], Jun 1920 , F. A. Rogers 26211 ( holotype K [ K 000431879 ]). = Coleus kassneri (T. C. E. Fr.) Robyns & Lebrun , Ann. Soc. Sci. Bruxelles, Sér. B 49: 106. 1929 . Type: DR. Congo , Mt Morumbe, between rocks, 12 May 1908 , T . Kassner 2951 ( holotype B destroyed; isotype BM , BR [ BR 0000006262532 ], E , K , P). Description. Paton et al. (2009: 289) ; Paton et al. (2013: 237) , as Plectranthus efoliatus (De Wild.) A. J. Paton. Distribution. Rwanda to S Tropical Africa. Habitat and ecology. Brachystegia miombo woodland, dry evergreen forest, steppic savannah, often on rocky outcrops or gravelly soil, occasionally on copper-rich soil; 1250–1400 m elev. Additional specimens. DR. Congo , Haut-Katanga , Welgelegen, 6 Jun 1912 , J. Bequaert 486 ( BR ); Tantara, 7 Aug 1956 , P. Duvigneaud & J. Timperman 2235 Col ( BRLU ); Katende, 50 km S Dilolo, 1957, P. Duvigneaud 2458 Col ( BRLU ); Elisabethville [Lubumbashi], May 1912 , H . Homblé 290 ( BR ); Lubumbashi, Katuba, 24 May 1927 , P. Quarré 450 ( BR ). Rwanda , Akagera, Lac Ihema, 15 Aug 1974 , P. Van der Veken 10806 ( BR ).