Kilian, N. & Greuter, W.: Sonchus esperanzae, nom. nov. (Compositae, Cichorieae). — Willdenowia 34: 65-66. — ISSN 0511-9618; © 2004 BGBM Berlin-Dahlem.
A new name in Sonchus is validated for Wildpretia beltraniae (non Sonchus ×beltraniae). The typification of both names is discussed, as it reflects on their valid publication, which is confirmed.
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