Taxon - Links and literature
Botanical Society of British Isles [http://www.bsbi.org.uk/], Botany Department, The Natural History Museum [as Berkheya rigida (Thunb.) Ewart, J.W. White & Rees]Data retrieved on: 11 May 2012
Kew Science - Plants of the World online 2024-05 [184621-1]
Kew Science - Plants of the World online [https://powo.science.kew.org], Facilitated by the Royal Botanic Gardens, Kew [as Berkheya rigida (Thunb.) Bolus & Wolley-Dod ex Levyns]
Data retrieved on: 31 January 2025