Scrophularia umbrosa Dumort.

POWO follows these authorities in synonymising this name:

• Chang, C.-S., Kim, H. & Chang, K.S. (2021). Checklist of Far East Asian Vascular Flora 2: 627-1887. EABCN, Seoul. [Cited as Scrophularia oblongifolia.]
• Mill, R. & al. (2015). Flora of Pakistan 220: 1-331. Department of Botany, University of Karachi, Karachi. [Cited as Scrophularia oblongifolia.]
• Stace, C. (2019). New Flora of the British Isles ed. 4: 1-1266. C & M Floristics. [Cited as Scrophularia oblongifolia.]

This name was accepted following an alternative taxonomy by these authorities:

• Davis, P.H. (ed.) (1978). Flora of Turkey and the East Aegean Islands 6: 1-825. Edinburgh University Press, Edinburgh. [Cited as Scrophularia umbrosa.]
• Fateryga, A. & al. (2013). Rediscovery of the endemic Scrophularia exilis (Scrophulariaceae) in the Crimean mountains and comments on its taxonomic status. Willdenowia 43: 251-256. [Cited as Scrophularia umbrosa.]
• Kosachev, P.A. (2010). Synopsis of the families Scrophulariaceae Juss. and Pediculariaceae Juss. of Altai mountain country. Turczaninowia 13(1): 19-102. [Cited as Scrophularia umbrosa.]
• Lazkov, G.A. & Sultanova, B.A. (2011). Checklist of vascular plants of Kyrgyzstan. Norrlinia 24: 1-166. [Cited as Scrophularia umbrosa.]
• Malyschev, L.I., Peshkova, G.A. & Baikov, K.S. (eds.) (2007). Flora of Siberia 14: 1-210. Scientific Publishers, Inc., Enfield, Plymouth. [Cited as Scrophularia umbrosa.]
• Polozhij, A.V. & Peschkova, G.A. (eds.) (2007). Flora of Siberia 12: 1-221. Scientific Publishers, Inc., Enfield, Plymouth. [Cited as Scrophularia umbrosa.]
• Rottensteiner, W.K. (2015). Notizen zur "Flora con Istrien", teil I. Joannea: Botanik 12: 93-195. [Cited as Scrophularia umbrosa.]
• Seregin, A.P. (2014). Flora of Vladimir Oblast, Russia: grid data analysis: 1-441. KMK schientific press, Moscow. [Cited as Scrophularia umbrosa.]
• Tutin, T.G. & al. (eds.) (1972). Flora Europaea 3: 1-370. Cambridge University Press. [Cited as Scrophularia umbrosa.]
• Uzunhisarcıklı, M.E., Güner, E.D. & Ekici, M. (2018). Synopsis of the genus Scrophularia (Scrophulariaceae) in Turkey. Phytotaxa 333: 151-187. [Cited as Scrophularia umbrosa.]