Compositae Working Group (CWG) (2025). Global Compositae Database. Porophyllum ruderale var. macrocephalum (DC.) Cronquist. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1236174 on 2026-09-01
original description(1970). Madroño 20 page(s): 255 [details]
original description(ofPorophyllum macrocephalum DC.)Candolle, A.P. (1836). Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta (Vol. 5). , available online athttps://www.biodiversitylibrary.org/page/151520 page(s): 648 [details]
Present Inaccurate Introduced: alien Containing type locality
Unreviewed
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Porophyllum ruderale (Jacq.) Cass. var. macrocephalum (DC.) Cronquist [Bolivia Checklist] Porophyllum ruderale (Jacq.) Cass. var. macrocephalum (DC.) Cronquist [IPNI] Porophyllum ruderale (Jacq.) Cass. var. macrocephalum (DC.) Cronquist [Preliminary Checklist of North American Compositae] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Madrono; Journal of the California Botanical Society 20(5): [Tropicos] [details] LSID urn:lsid:compositae.org:names:6A1A957C-2FF2-49E0-8D9E-CD6C0B903905 [details]