Fagúndez, J. (2012). Study of some European wild hybrids of Erica L. (Ericaceae), with descriptions of a new nothospecies: Erica ×nelsonii Fagúndez and a new nothosubspecies: Erica ×veitchii nothosubsp. asturica Fagúndez. Candollea 67: 51–57. In English, English and French abstracts.
Wild hybrids issued from crossing European species of genus Erica L. are described. The close study of the type material of Erica ×lazaroana Rivas Goday & Bellot (Erica arborea L. × Erica umbellata L.) shows that it should be regarded as a new synonym of Erica arborea. Erica ×nelsonii Fagúndez (Erica cinerea L. × Erica tetralix L.), a new nothospecies from Ireland, is described from herbarium material. Erica ×veitchii nothosubsp. asturica Fagúndez (Erica arborea × Erica lusitanica subsp. cantabrica Fagúndez & Izco) is also described. A study of seed micromorphology shows evidence of hybridization between Erica tetralix L. and Erica ciliaris L.