The new species Coleus namuliensis (Lamiaceae) is described from the granite outcrops and grasslands of Mt Namuli in Zambezia Province of Mozambique. It has previously been confused with Plectranthus caudatus, a species that is restricted to the quartzite outcrops of the Chimanimani Mountains on the Mozambique-Zimbabwe border for which the new combination in Coleus is formalised in this paper. Other potential confusion species are discussed and a rationale for applying the generic name Coleus rather than Plectranthus is provided. Despite their highly restricted ranges, C. namuliensis and C. caudatus are both considered to have a conservation status of Least Concern at present, although climate change may pose a longer-term threat to their survival.

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Blumea: Biodiversity, Evolution and Biogeography of Plants

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Downes, E., & Darbyshire, I. (2017). Coleus namuliensis and Coleus caudatus (Lamiaceae):a new species and a new combination in the Afromontane flora of Mozambique and Zimbabwe. Blumea: Biodiversity, Evolution and Biogeography of Plants, 62, 168–173. doi:10.3767/blumea.2017.62.03.02