Euphorbia volhynica Besser ex Racib. = Euphorbia illirica Lam.
English:
volhynicus,-a,-um;

https://archive.org/stream/#page/107/mode/2up
homotypic synonyms:
Tithymalus volhynicus (Besser ex Racib.) Holub;

protologue: Fl. Polski 2: 107 (1921)

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