Oiolairë

'Ever-summer'; an evergreen tree brought to Númenor by the Eldar of Eressëa, from which was cut the Bough of Return set upon the Númenórean ships. Called also Bough of Return.

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'Ever-summer'.
A sweet-scented tree that grew in Númenor, and especially in the western region known as Nísimaldar. It was the custom among Númenórean mariners to place a cut bough of oiolairë on the prows of their ships, as a symbol of good fortune.