The Collaborative International Dictionary
leopardbane \leop"ard*bane\ (l[e^]p"[~e]rd*b[=a]n`), n. Any of several herbs of the genus Doronicum (as Doronicum acaule syn. Arnica acaulis) having alternate often clasping stem leaves cultivated for their long stalks of yellow flower heads. See leopard's bane.
Syn: leopard's-bane, leopard's bane.
false" leop`ard*bane (f[add]ls" l[e^]p`[~e]rd*b[=a]n`), n. Any of several herbs of the genus Doronicum, such as the great false leopardbane ( Doronicum pardalianches) of North America and the oriental false leopardbane ( Doronicum orientale syn. Doronicum caucasicum).
Wikipedia
Doronicum orientale (Leopard's Bane) is a European plant species in the sunflower family. It is native to southeastern Europe ( Italy, Greece, the Balkans, Hungary, Moldova, Ukraine, southern European Russia) and parts of southwest Asia ( Turkey, South Caucasus). It is also widely cultivated as an ornamental. There are a few reports of the species having escaped cultivation and been found growing wild in parts of Canada, but the plant apparently failed to become established there.
Doronicum orientale is a hardy (to zone 3) perennial, blooming in early spring. It has daisy-like yellow flower heads on long, straight stems, which attract nectar-eating insects. The plants grow to approximately 2 feet (60 cm) tall. Likes both shade and sun. All parts of this plant are poisonous to humans.
The specific epithet "orientale," meaning "eastern" is in reference to eastern Europe, not eastern Asia.