Definition of "nectarous"

Sylphs! if at noon the Fritillary droops, / With drops nectarous hang her nodding cups […] .

1791, Erasmus Darwin, The Economy of Vegetation, J. Johnson, page 204

Then did you, chivalrous Terence, hand forth, as to the manner born, that nectarous beverage.

1922 February, James Joyce, Ulysses, Paris: Shakespeare and Company, […]