Haworthia species list
Bruce Bayer, Feb 24th 2009
(superceding that in Alsterworthia 2006)
This new list suggests a new order for Haworthia.
Note that the typical variety has been dispensed with.
Instead notable variants of unspecified rank are listed and it is suggested that many of the recent new species names – and in fact some of the older historical names can be re-instituted at will within what I consider to be this close-to-natural order. Thus there is no pretension to a full understanding of relationships beyond some primary order.
Formal botanical names are group names and it may be necessary to specify when a name is essentially a single clone eg. H. retusa ‘geraldii’ (cl). Author names are probably necessary to trace origins of names and also to attach some degree of ‘authority’ and ‘authenticity’, as clearly there is considerable confusion about what constitutes an element of botanical significance as opposed to collector and trade interest and value.
This system allows for populations to be recognized eg H. mutica ‘MBB7801’ or H. mutica ‘Buffeljags’. Possibly there should be a category for populations that appear to be of hybrid origin eg H.X retusaXmirabilis (for say MBB7234 Die Plotte, Heidelberg).