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Rheum rhabarbarum L.
Градински ревен; Рабарбар
·V·VI·VII· ·V·VI·VII·
50-200 cm. V-VII.
 
Woodville, W., Hooker, W.J., Spratt, G., Medical Botany, 3th edition, vol. 5: t. 24 (1832)