Coleus buchananii Brenan

Coleus buchananii (Baker) Brenan, Mem. New York Bot. Gard. 9: 43. 1954. ≡ Plectranthus buchananii Baker in D. Oliver & auct. suc. (eds.), Fl. Trop. Afr. 5: 402. 1900. Type: Malawi, Shire Highlands, Nakajumbu, 15 Oct 1881, J. Buchanan 365 (holotype K [K 000431996]; isotype E [E 00193487]). = Coleus kisanfuensis De Wild., Contr. Fl. Katanga: 174. & Ann. Soc. Sci. Bruxelles 41 (2): 48. 1921. Type: DR. Congo, Elisabethville [Lubumbashi], Sep 1911, A. Hock s. n. (lectotype BR [BR 0000008730572], designated here), syn. nov. Description. Paton et al. (2009: 324), Paton et al. (2013: 263), as Plectranthus buchananii Baker. Distribution. Tanzania to S Tropical Africa. Habitat and ecology. Dry woodlands, wooded savannah, steppic savannah, often on rocky soil, occasionally on copper-rich soil; 950–1550 m elev. Additional specimens. DR. Congo, Haut-Katanga, Upemba, près de la Lufira, 30 Aug 1948, G. F. de Witte 4222 (BR); Vallée de la Lofoi, près du village Nkonko, 3 Oct 1970, S. Lisowski 23358 (POZG); Luiswishi, 21 Sep 1984, F. Malaisse 13191 (BR); Région de Fungurume, colline “ monde arabe ”, 24 Jul 2007; B. Senterre 4676 (BR); Tantara, autour de la mine, 3 Sep 1977, R. Wechuysen 865, 866, 867 (BR). Burundi, Bururi, 1951, A. Becquet 2149 (BR); Bururi, route Makamba-Dunga, km 20, 21 Sep 1977, M. Reekmans 6378 (BR). Notes. 1. Coleus kisanfuensis De Wild. was unplaced in Paton et al. (2019), because the original materials had not been found. The materials were misfiled in BR as “ Coleus hockii De Wild. ” (which is Coleus betonicifolius var. kasomenensis (De Wild.) Meerts & A. J. Paton). The specimen [BR 0000008109613] indeed bears a label handwritten by De Wildeman as “ Coleus hockii De Wild. ”, but this is obviously a mistake, because the protologue of C. kisanfuensis clearly refers to C. buchananii, not to C. betonicifolius. 2. Lectotypification of Coleus kisanfuensis De Wild. De Wildeman (1921 b) cited two syntypes, i. e. A. Hock s. n. (syntype BR [BR 0000008109613]), DR. Congo, Kisanfu, Sep 1911 and A. Hock s. n. (syntype BR [BR 0000008732835] and [BR 0000008730572]), Elisabethville [Lubumbashi], Sep 1911. The three sheets match the protologue. We designate [BR 0000008730572] as the lectotype because it does not bear the erroneous name Coleus hockii De Wild.