Abstract
The genus Plectranthus, as currently delimited, includes around 300 species (Codd 1975) with the majority concentrated in East Africa. Subgenus Plectranthus sensu Codd includes a large portion of the southern African species, and is based on characters such as enlargement of the upper calyx lobe, staminal filaments which are free to their bases, and many-flowered sessile cymes. This subgenus is subdivided into 2 sections. The typical section is concentrated in southern Africa and Madagascar and has flowers which occur in few-flowered, sessile or shortly branched cymes subtended by sub-persistent, albeit tiny, bracts. The second section, to which the new species belongs, is Coleoides Benth., whose members have a declinate calyx which is basally gibbous, and flowers borne in dense clusters (3 15) usually subtended by caducous bracts. The section is recorded from South Africa through tropical East Africa, India and Australia, and its members often occur in seasonally dry habitats. Codd (1975, 1985) comments that species boundaries within section Coleoides in southern Africa are difficult to define and
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