Aphis cytisorum, the laburnum aphid or broom aphid, is a species of aphid in the family Aphididae. It has two currently recognized subspecies: A. cytisorum ssp. cytisorum, which feeds on Laburnum, and A. cytisorum ssp. sarothamni, which feeds on Broom. Adults are usually a very dark green color, but may appear dark grey due to the white waxy secretions.