Compositae Working Group (CWG) (2024). Global Compositae Database. Verbesina holwayi var. holwayi. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1158124 on 2025-03-28
LSID urn:lsid:compositae.org:names:B477A3BD-BBC8-448E-8220-C8931E64189B [details] Specimen Guatemala: Huehuetenango: San Juan Ixcoy 9200 f, 5 Aug 1965, Dennis E. Breedlove 11467 (MO). [details]