Some species of Plectranthus are difficult to identify because of a lack of clear-cut morphological criteria to discriminate not only among species within the genus but also among the closely related genera. This has resulted in numerous taxonomic problems in the naming of species with the result that species have often been placed in several closely related genera like Coleus, Solenostemon and Englerastrum. In addition, some species formally placed in Plectranthus, are now recognized as the more distantly related genus Isodon.
Because of these taxonomic issues, different names have often been used for the same species of Plectranthus and thus it has been difficult to collate information about the ethnobotanical uses of this genus. Furthermore, the most commonly used medicinal species of Plectranthus have a high degree of synonymy[
This report is very much indebted to the work of C.W. Lukhoba et al. - Journal of Ethnopharmacology 103 (2006) 1-24[
] in untangling much of this mess of names, and utilizes the on-line Kew database ‘World Checklist of Selected Plant Families (http://wcsp.science.kew.org/home.do) for determining currently accepted names and synonyms (as of 2018).
Coleus stachyoides (Oliv.) E.A.Bruce
Plectranthus cylindrostachys Robyns & Lebrun
Plectranthus stachyoides is a herbaceous perennial plant with stout, erect stems that branch above and can become more or less woody; it can grow 90 - 300cm tall[
The plant is harvested from the wild for local use as a medicine
The plant is classified as 'Least Concern' in the IUCN Red List of Threatened Species(2013)[
Tropical Africa - Central African Republic, DR Congo, Uganda, Kenya, Rwanda, Burundi, Tanzania
Grassland or open Acacia woodland; at elevations from 1,100 - 1,800 metres[
The plant is used in the treatment of skin conditions[
Seed - sow in well-drained soil, covering lightly with a thin layer of sand, and place in a warm but shaded spot. The seed germinates in about three weeks[
Cuttings of Plectranthus species generally root easily - soft tips root faster than semi-hardwood growth. The cuttings are best taken 60 - 100mm long with three or four nodes, making the cut just below a node. Place them in sand, perlite, vermiculite or peat, or any mixture of these, keep them moist and shaded and they should root in 2 - 3 weeks[
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