Werdermann traveled to Madrid to see the collections of Hipólito Ruiz López and José Antonio Pavón Jiménez.
José Antonio Pavón Jiménez or José Antonio Pavón (April 22, 1754, Casatejada, Cáceres, Spain – 1840, Madrid) was a Spanish botanist known for researching the flora of Peru and Chile.
San Antonio | San Jose | Antonio Vivaldi | San José | San José, Costa Rica | José Carreras | Antonio Banderas | José Feliciano | San Antonio Spurs | San Jose Mercury News | José José | José Saramago | José María Aznar | José Ferrer | San Jose State University | José Rizal | José de San Martín | Gatpuno Antonio J. Villegas Cultural Awards | Antonio Villaraigosa | Antonio Margarito | Antonio López de Santa Anna | San Jose Sharks | Port Antonio | San José Province | Juan Ramón Jiménez | José Raúl Capablanca | José Limón | Antonio Canova | José Martí | José Luis Rodríguez Zapatero |
Due to his formation under Casimiro Gómez Ortega at Madrid's Royal Botanical Garden, Hipólito Ruiz López was named head botanist of the expedition, with French physician Joseph Dombey and pharmacologist José Antonio Pavón Jiménez appointed as his assistants.
Ruiz and Pavón dedicated to him Molina, later considered a subgenus of Baccharis by Heering (Reiche 1902), and recently F. H. Hellwig recreated as Neomolina and ranked as genus.