Actaea rubra, a poisonous herbaceous flowering plant in the family Ranunculaceae, native to North America.
The bead tree or azedarac, Melia azedarach, a deciduous tree in the mahogany family Meliaceae, native to India, southern China and Australia, or its fruit.
The soapberry (genus Sapindus, especially Sapindus saponaria), native to the Americas.
Any of several flowering plants, of the genus Syringa, such as the lilacs.
Hence any of several flowering plants of the genus Philadelphus, such as now in the Western United States Philadelphus lewisii.