Compositae Working Group (CWG) (2021). Global Compositae Database. Xylorhiza villosa Nutt.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1194735 on 2025-03-24
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Transactions of the American Philosophical Society, new series, 7: [Tropicos] [details] LSID urn:lsid:compositae.org:names:12D7E9FC-F281-4D08-A358-9A2B03CCE32A [details] Taxonomy Oct-Dec 1840 [details] Type material s. n., T.Nuttall, lectotype GH [details]