Adjective
Secreting nectar; -- said of blossoms or their parts.
Source: Webster's dictionaryIn his Anatome plantarum is a longitudinal section of a flower of Nigella (his Melanthi, literally honey-flower) with details of the nectariferous organs. Source: Internet
Nectaries are often present as a nectariferous disk atop the ovary. Source: Internet