Paton, A.J., Mwanyambo, Culham, A. (2018) Phylogenetic study of Plectranthus, Coleus and allies (Lamiaceae): taxonomy, distribution and medicinal use Botanical Journal of the Linnean Society 20 1-22
Paton, A.J., Mwanyambo, M., Govaerts, R.H.A., Smitha, K., Suddee, S., Phillipson, P.B., Wilson, T.C., Forster, P.I., Culham, A. (2019) Nomenclatural changes in Coleus and Plectranthus (Lamiaceae): a tale of more than two genera Phytokeys 129 1-158
Annual or perennial herbs or soft wooded shrubs. Leaves opposite. Inflorescence thyrsoid, usually laxt. Flowers pedicelate. Calyx funnel-shaped, straight with pedicel attached symmetrically at the base of the calyx, two-lipped; posterior lip with a single broad lobe; anterior lip 4-lobed. Corolla two-lipped with lips equal in length; tube s-shaped, expanding towards throat; posterior lip 4-lobed erect or ascending; anterior lobe horizontal, boar-shaped, sometimes frilled at apex. Stamens 4; filaments not fused together, held within the anterior lip. Style bifid with lobes subulate. Nutlets ovoid. Derivation of name: With equal labia, referring to the corolla lips being of the same length. Worldwide: 40 species mainly in Tropical Africa and 2 in India. DRC: 0 taxa. |
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