Clerodendrum johnstonii var. rubropunctatum Meerts, 2023

Meerts, Pierre, 2023, The genus Clerodendrum (Lamiaceae) in the flora of Central Africa (D. R. Congo, Rwanda, Burundi), Phytotaxa 594 (1), pp. 1-42 : 21

14b. Clerodendrum johnstonii var. rubropunctatum Meerts var. nov.

Type:— BURUNDI. Territoire Muramvya, Bugarama , 1950 m a.s.l., forêt secondaire, 29 February 1971, Lewalle 5216 (holotype: BR0000019275567!; iso-: WAG1612814 ) .

Differs from the type variety by the lower surface of lamina less pubescent, the indumentum concentrated on veins, very short to curly, areolae subglabrous with numerous sessile dark red glands; flower bud tomentose, with dark red sessile glands.

Distribution in Central Africa:—D.R. Congo, Rwanda, Burundi.

Distribution elsewhere:— Tanzania (Milne-Redhead & Taylor 8983 (BR!)).

Habitat:—Same as type variety.

Selection of representative specimens:— D.R. CONGO. Lacs Edouard et Kivu: Territ. Uvira, Kitiga , 25 May 1994, Bashonga 140 (BR!); Bishoke, rivière Susa, 11 February 1935, de Witte 2225 (BR!); Bukulumisa, 30 January 1938, F. L. Hendrickx 482bis (BR!) .— RWANDA. Lacs Edouard et Kivu: Forêt de Nyungwe, environs de Cyurugaya, 14 March 1971, Bouxin 479 (BR!); Gikongoro , vallée du Mont Gahiro, 25 July 1999, Ewango 2143 (BR!, GIS, M, MO, WAG); Env. Uwinka, 7 July 1960, Troupin 12021 (BR!); Cyungu-meer, 25 February 1972, van der Veken 9587 (BR!).

Rwanda-Burundi: Rutovu, km 62 de la route Astrida-Shangugu, 14 April 1958, Reynders 297 (BR!).— BURUNDI. Lacs Edouard et Kivu: Teza, 10 January 1993, Breyne 5936 (BR!, WAG); Forêt de Nyungwe , environs de Rukuzi, 19 May 1971, Bouxin 801 (BR!); Ijenda, 21 November 1967, Petit 1788 (BR!).

Note:—This variety departs from var. marsabitense by the dark red glands on lower leaf surface and outer surface of corolla lobes. Some specimens have very sparse or pale coloured glands, approaching var. marsabitense (Frédéricq in de Witte 8035; Lebrun 4953).