Nerium oleander

L.

Taxonomic origins disputed, Nerium Oleander was first assigned by Linnaeus in 1753. The genus name Nerium is the Latinized form of the Ancient Greek name for the plant nẽrion (νήριον), which is in turn derived from the Greek for water, nẽros (νηρός), because of the natural habitat of the oleander along rivers and streams.

The word oleander appears as far back as the first century AD, when the Greek physician Pedanius Dioscorides cited it as one of the terms used by the Romans for the plant. Merriam-Webster believes the word is a Medieval Latin corruption of Late Latin names for the plant: arodandrum or lorandrum, or more plausibly rhododendron (another Ancient Greek name for the plant), with the addition of olea because of the superficial resemblance to the olive tree (Olea europea).

Another theory posited is that oleander is the Latinized form of a Greek compound noun: οllyo (ὀλλύω) 'I kill', and the Greek noun for man, aner, genitive andros (ἀνήρ, ἀνδρός). ascribed to oleander's toxicity to humans. The etymological association of oleander with the bay laurel has continued into the modern day: in France the plant is known as "laurier rose", while the Spanish term, "Adelfa", is the descendant of the original Ancient Greek name for both the bay laurel and the oleander, daphne, which subsequently passed into Arabic usage and thence to Spain.

The ancient city of Volubilis in Morocco may have taken its name from the Berber name alili or oualilt for the flower.

This is the only species currently classified in the genus Nerium. It belongs to the small tribe Nerieae of subfamily Apocynoideae of the dogbane family Apocynaceae. The genera most closely-related thus include the equally ornamental (and equally toxic) Adenium G.Don and Strophanthus DC. - both of which contain (like Oleander) potent cardiac glycosides that have led to their use as arrow poisons in Africa. The three remaining genera Alafia Thouars, Farquharia Stapf and Isonema R.Br. are less well-known in cultivation.