John Charles Manning (1962-) was born in Pietermaritzburg, South Africa. He is a botanist based in the Compton Herbarium, South African National Biodiversity Institute (SANBI), researching on the systematics in South African flora.
In 2014, Manning et al. published A Molecular Phylogeny and Generic Classification of Asphodelaceae Subfamily Alooideae: A Final Resolution of the Prickly Issue of Polyphyly in the Alooids? in Systematic Botany. They produced a phylogeny of the tribe Aloeae of the family Asphodelaceae, and divided the genus Haworthia into 3 segregate genera, accepting the names proposed by Rowley. The division roughly corresponds to the previously recognized subgenera from Bayer.