Contains all cultivar names and all botanical names that have been traced within the genera Andromeda, Bruckenthalia (recently subsumed into Erica), Calluna and Daboecia. All the names of cultivars and subspecific taxa for those species of Erica indigenous in Europe, Asia Minor and the Atlantic islands
(Azores, Madeira and the Canary Islands) and for their hybrid taxa - the so-called hardy heaths and heathers - are also included.
Entries in this publication are in strict alphabetical sequence, their order being determined by the alphabetic sequence of, first, the genus and, then, the species to which they belong, and, thereafter, of the names of the ranks, as follows - cultivar; forma; species; subforma; subspecies; subvariety; variety.