Compositae Working Group (CWG) (2021). Global Compositae Database. Willoughbya psilostachya (DC.) Kuntze. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1174220 on 2025-02-02
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Revis. Gen. Pl. 1 [MesoAmericana] Revisio Generum Plantarum 1: [Tropicos] [details] LSID urn:lsid:compositae.org:names:E0DF43DF-AE0E-4127-81A8-2EA2FE34157F [details] Type material Peru: in Peruviâ? ex coll. Poeppig,. [details]