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Total flavonoid content (black bars; Fl) and total phenolic content (grey bars; TPC) in nine varieties of C. officinalis leaves. Varieties: “Egypt Sun” (ES), “Flame Dance” (FD), “Geisha” (G), “Green Heart Orange” (GHO), “Indian Prince” (IP), “Radio” (R), “Red Black Centered” (RBC), “Russian Size” (RS), and “Touch of Red” (TOR). Under the bars—means of content, mg g−1.
