[Wikipedia] Eurasia native: Hypericum androsaemum, also referred to as Tutsan, Shrubby St. John's Wort, or sweet-amber,[1] is a flowering plant in the family Hypericaceae. It is a perennial shrub reaching up to 70 cm in height, native to open woods and hillsides in Eurasia. (contributed by Mary Ann Machi)

[Cal-IPC] Invasiveness potential: Hypericum androsaemum (sweet-amber) is a shrub (family Clusiaceae) with yellow flowers and oval shaped leaves found in the San Francisco Bay area in California. It is native to Europe and western Asia. It favors woodlands, forests and riparian and bottomland habitat. It reproduces by seed. Animals, water, mud and machinery can disperse this plant. (contributed by Mary Ann Machi)