Compositae Working Group (CWG) (2021). Global Compositae Database. Echinops otarus Mattf.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1176379 on 2025-03-24
Contributed data: Notes Data only shown for fields conflicting with the consensus taxon record ori:FTA [African Plant Database] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Bot. Jahrb. Syst. 59(133) [Govaerts World Compositae Checklist A-G] Bot. Jahrb. Syst. 59, Beibl.: 55 (1924). [African Plant Database] Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 59, Beibl. 133: [Tropicos] [details] LSID urn:lsid:compositae.org:names:15C2E4C8-B16D-49FB-9782-3AA1CB8C60CC [details] Taxonomy 15 Dec 1924 [details]