León María Guerrero y Leogardo (January 21, 1853 – April 13, 1935) was a Filipino writer, revolutionary leader, politician, the first licensed pharmacist in the Philippines, and one of the most eminent botanists in the country during the late Spanish colonial period.

León Jorge was the uncle of poet-politician, Fernando María Guerrero, who won a seat at the Philippine Assembly in 1907.

[3] After completing his primary and secondary education, he enrolled at the University of Santo Tomas, where he graduated in 1875 with a degree Bachelor of Science in Pharmacy, specializing in Botany and Zoology.

His accomplishments also earned him an appointment as chemical expert of the Audiencia Real, the supreme court during the Spanish colonial period.

He also pursued special studies in ornithology and lepidopterology,[5] securing him a position as zoologist in the forestry bureau of the Spanish colonial government.

He was named professor of Pharmacy of the Universidad Literaria de Filipinas, which was founded by the Philippine Revolutionary Government on October 19, 1898.

He was among the founders of the Partido Democrata (Democratic Party) which advocated absolute Philippine independence from the United States, but through peaceful means.

After his stint in national politics, Guerrero returned to teaching and became dean of the Faculty of Pharmacy of the University of Santo Tomas.

In recognition of his work in botany, taxonomists named a genus of plants, Guerreroia monocephala, and a species of orchids, Dendrobium guerreroi, in his honor.