The Pilocarpus microphyllus Stapf ex Wardlew spe cie is a native plant from north and northeast of Brazil occurring in eastern of Pará state, n orthwest and north of Maranhão and Piauí. It is one of the most important Brazilian medicinal species presents in pharmacopoeia of the entire world due to the use of its active pilocarpine. When using the Web of Science periodic base with Pilocarpus genus the result was...