Salvadorian botanist based in the laboratories of the Department of Agriculture. Salvador Calderón is best known for co-authoring the Flora Salvadoreaña with the eminent American botanist Paul C. Standley. From Standley's arrival in El Salvador in December 1921 until May 1922 the two collected specimens together all over the country. In total for the project they amassed three tonnes worth of material, accounting for 4,600 specimens, which were sent to Washington D.C. for identification and were also deposited in the American herbaria GH and NY. Calderón himself collected many interesting and important specimens from regions which Standley did not visit, particularly finding unique examples around the capital, in Zacatecoluca, Sonsonate and San Martín. Also collecting with the Salvadorian lawyer, José María Carrillo, Calderón founded a herbarium in San Salvador with 2,000 of the projects specimens: TECLA was part of the Direccion General de Agricultura at the time. Their work was published in its initial form as Lista preliminar de las plantas de El Salvador in 1925 and the second edition (the Flora Salvadoreaña) in 1941 was a posthumous publication for Calderon who had passed away the pervious year. The original described 2,070 native species of fungi, bryophytes and vascular plants with an indication of their range, vernacular names and notes on their habitat and uses. In addition the latter contained four unedited manuscripts of Calderón's.

Sources:
D.G. Frodin, 1984, Guide standard floras world
F. Stafleu and R. Cowan, 1976–1998, Taxonomic Literature: A selective guide to botanical publications and collections with dates, commentaries and types - Second edition
P.C. Standley and S. Calderón, 1941, Flora Salvadoreaña
F. Verdoorn, 1941, " Salvador Calderón", Chronica Botanica, 6(8): 188.