Haría - Calle Ramon Y Cajal-LZ-10 - Mirador de Haría - Sonchus pinnatifidus 02 ies.jpg
COI00041307 - Sonchus acidus - Bourgeau, Eugne - 1379.jpg
Herbarium of the University of Coimbra (COI)
Taxonomy database of the U.S. National Center for Biotechnology Information
Global Biodiversity Information Facility
Open Tree of Life reference taxonomy version 3.2