From Medicinal Plants Usage
Opinions vary as the status of this taxon. It was raised to species rank in 2000 by Alvarez and Fernandez Casas, and is accepted by The Plant List and the World Checklist, but the Royal Horticultural Society still consider it a be the subspecies (see Synonyms). Genetic studies support species rank.<ref>Daffnet: N. lusitanicus. 2010</ref>
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