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Table 1 Phytochemical screening of methanol extract of flower and root of Pyrostegia venusta (Ker-Gawl.) Miers

From: Preliminary study of the antioxidant properties of flowers and roots of Pyrostegia venusta (Ker Gawl) Miers

S.No. Constituents Methanol extract
   Flower Root
1 Alkaloids   
     • Dragendorff's test ++ ++
2 Terpenes and steroids   
     • Salkowski test ++ ++
     • Libarman- Burchard's test ++ ++
3 Tannins   
     • FeCl3 test ++ ++
     • Gelatin test ++ ++
4 Saponins - ++
     • Frothing test   
  1. Key:- = Negative (absent)
  2. ++ = Positive (present)