= Ocimum suffrutescens Schumach.; Kongel. Danske Vidensk. Selsk. Naturvidensk. Math. Afh. 4: 330 (1829)
= Ocimum thonningii Thonn.; Beskr. Guin. Pl. [Schumacher] 269 (1827)
= Ocimum thymiflorum Roth; Nov. Pl. Sp. 269 (1821)
= Ocimum triste Roth; Nov. Pl. Sp. 270 (1821)
= Orthosiphon australis Vatke; Linnaea 40: 179 (1876)
= Orthosiphon buryi S.Moore; J. Bot. 45: 233 (1907)
= Orthosiphon calaminthoides Baker; Bull. Misc. Inform. Kew 1895: 225 (1895)
= Orthosiphon chevalieri Briq.; Mém. Soc. Bot. France 8: 284 (1914 publ. 1917)
= Orthosiphon coloratus Vatke; Linnaea 43: 86 (1881)
= Orthosiphon glabratus Benth.; Pl. Asiat. Rar. [Wallich] 2: 14 (1830)
= Orthosiphon glabratus var. africanus Benth.; Prodr. [A.P. de Candolle] 12: 51 (1848.
= Orthosiphon glabratus var. parviflorus (Benth.) Gamble; Fl. Madras 2: 1114 (1924)
= Orthosiphon heterochrous Briq.; Bot. Jahrb. Syst. 19: 173 (1894)
= Orthosiphon hildebrandtii Baker; Fl. Trop. Afr. [Oliver et al.] 5: 372 (1900), nom. illeg.
= Orthosiphon inconcinnus Briq.; Bull. Herb. Boissier, Sér. 2, 3: 991 (1903)
= Orthosiphon iodocalyx Briq.; Bot. Jahrb. Syst. 19: 174 (1894)
= Orthosiphon liebrechtsianum Briq.; Bull. Soc. Roy. Bot. Belgique 37: 84 (1899)
= Orthosiphon longipes Baker; Fl. Trop. Afr. [Oliver et al.] 5: 373 (1900)
= Orthosiphon marmoritis (Hance) Dunn; Notes Roy. Bot. Gard. Edinburgh 8: 154 (1913)
= Orthosiphon merkeri Gürke; Bot. Jahrb. Syst. 36: 208 (1905)
= Orthosiphon mollis Baker; Bull. Misc. Inform. Kew 1895: 275 (1895)
= Orthosiphon mombasicus Baker; Fl. Trop. Afr. [Oliver et al.] 5: 369 (1900)
= Orthosiphon neglectus Briq.; Bull. Herb. Boissier, Sér. 2, 3: 988 (1903)
= Orthosiphon petiolaris Miq.; Fl. Ned. Ind. 2: 943 (1858)
= Orthosiphon rabaiensis S.Moore; J. Bot. 44: 26 (1906)
= Orthosiphon rabaiensis var. parvifolia S.Moore; J. Bot. 44: 26 (1906)
= Orthosiphon roseus Briq.; Bot. Jahrb. Syst. 19: 174 (1894)
= Orthosiphon silvicola Gürke; Bot. Jahrb. Syst. 41: 327 (1908)
= Orthosiphon sinensis Hemsl.; J. Linn. Soc., Bot. 26: 268 (1891)
= Orthosiphon somalensis Vatke; Linnaea 43: 87 (1880 publ. 1882)
= Orthosiphon stuhlmannii Gürke; Pflanzenw. Ost-Afrikas C 349 (1895)
= Orthosiphon suffrutescens (Schumach.) J.K.Morton; J. Linn. Soc., Bot. 58: 266 (1962)
= Orthosiphon tenuifrons Briq.; Mém. Soc. Bot. France 8: 283 (1914 publ. 1917)
= Orthosiphon thymiflorus var. viscosus (Benth.) Sleesen; Reinwardtia 5: 43 (1959)
= Orthosiphon tomentosus var. glabratus (Benth.) Hook.f.; Fl. Brit. India [J.D.Hooker] 4: 614 (1885)
= Orthosiphon tomentosus var. parviflorus Benth.; Prodr. [A.P. de Candolle] 12: 51 (1848)
= Orthosiphon tomentosus var. rubiginosus C.B.Clarke ex Hook.f.; Fl. Brit. India [J.D.Hooker] 4: 614 (1885)
= Orthosiphon tomentosus var. viscosus (Benth.) Hook.f.; Fl. Brit. India [J.D.Hooker] 4: 614 (1885)
= Orthosiphon usambarensis Gürke; Abh. Königl. Akad. Wiss. Berlin 1894: 62 (1894)
= Orthosiphon viatorum S.Moore; J. Linn. Soc., Bot. 37: 199 (1903)
= Orthosiphon viscosus Benth.; Pl. Asiat. Rar. [Wallich] 2: 14 (1830)
= Orthosiphon wilmsii Gürke; Bot. Jahrb. Syst. 26: 81 (1898)
= Plectranthus bolusii T.Cooke; Bull. Misc. Inform. Kew 1909: 377 (1909)
= Plectranthus marmoritis Hance; J. Bot. 12: 53 (1874)
= Plectranthus thymiflorus (Roth) Spreng.; Syst. Veg., ed. 16 [Sprengel] 2: 690 (1825)
= Plectranthus tristis (Roth) Spreng.; Syst. Veg., ed. 16 [Sprengel] 2: 690 (1825)