Teri, An aphid tree is not a specific species of tree but one that is 'infested' with aphids. The aphids feed on the plant juices and produce a sugary exudate. (Park your car underneath one of those trees and you know what we are talking about!). The exudate is collected by bees (and other insects, including wasps) and utilized as 'nectar' source. The resulting product is called honeydew. In Europe, honeydew has been a priced product for centuries. Some regions are reknown for their honeydew. regards, Paul van Westendorp [log in to unmask] Provincial Apiculturist BC Ministry of Agriculture, Fisheries & Food