Like white willow, poplar offers an analgesic effect when used topically, and also makes a good massage oil. Poplar Bud Salve is made from the resinous spring-emerging buds of the common Cottonwood tree (Populus spp.). Individual stems are collected from the many trees on our property, and then we break off the sticky leaf-buds one at a time – there is no fast way to do this! The buds are then gently heated in olive oil for many hours until they release their resin. The aroma of this salve is very fragrant. Hardened with beeswax.