Source: Hörandl, E. & Raab-Straube, E. von (2015+): Ranunculeae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
Ranunculus angustior (Markl.) Ericssonin Ann. Bot. Fenn. 29: 133. 1992
≡Ranunculus cassubicus subsp. angustior Markl.in Fl. Fenn. 4: 85. 1965
Euro+Medendemic: Baltic states, with Kaliningrad regionnativeA; BelarusnativeA; Russia (C European RussianativeA, E European RussianativeA, N European RussianativeA, NW European RussianativeA,B)
Bibliography
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B.Tzvelev, N. N. 2000: Opredelitel' sosudistych rastenij severo-zapadnoj Rossii. – Sankt-Peterburg
