| Eupatorium |
a genus of composite-flowered plants (family Compositae). E. ayapa´na (called also Eupato´rium tripliner´ve) is a Brazilian shrub whose leaves are used medicinally and called ayapana (q.v.). E. rugo´sum (called also E. urticaefo´lium) is the white snakeroot, which contains the toxic principle tremetol and causes trembles in cattle and sheep.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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