Abstract
My first essay in critical taxonomy as a young botanist at Kew was a revision of Kissenia R. Br. ex Endl., the only extra-American genus of Loasaceae. Kissenia occurs in two geographically isolated populations, one in south Arabia and the neighbouring parts of north-east Africa, the other in southwest Africa. These populations had previously been considered to be conspecific, and the object of my revision was to determine whether they could be distinguished as separate taxa. The results were published in Bull. Misc. Inf. Kew 1926: 174-180 (1926) under the title 'Notes on Kissenia and the Geographical Distribution of the Loasaceae'. As explained in that paper I was able to recognize the two populations as distinct species, which I described and figured under the names K. spathulata R. Br. ex T. Anders. and K. capensis R. Br. ex Harvey. I have no reason to change the taxonomic views there expressed; but it is now evident that, owing to inexperience, the nomenclature which I adopted was not entirely correct, and the purpose of the present note is to make the necessary adjustments.
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