Polygonum oxyspermum C. Meyer & Bunge [ Polygonum raii Bab.]
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Polygonum oxyspermum C. Meyer & Bunge [ Polygonum raii Bab.] [Polygonaceae]
V.L. Komarov (Komorov), Fl. URSS, vol. 5 : p. 619, t. 40, fig. 5 (1934-1964)