A study of foliar flavonoids of Six Species Of Bauhinia

The chromatograms of foliar flavonoids of the six species of Bauhinia investigated here revealed 45 spots. Of these 22 spots could be identified which represent 7 flavonoids. Two of the 7 identified flavonoids viz. Quercetin, Kaempferol were common to all the six species. While Apigenin was present in three species viz. B. blakeana, B. purpurea and B. variegata, Myrecitin was present only in B. racemosa where as Isorhamnetin was present in two species viz. B. blakeana and B. purpurea. Luteolin present only in B. tomentosa Bauhinia species can be distinguished by the presence of derivatives of Quercitin viz. Qurecitin-3-glucoside (Isoquercitrin) was present in B. tomentosa, Qurecitin-3-rutinoside (Rutin) was present in three species viz. B. tomentosa, B. variegata, and B. purpurea. Qurecitin-3-rhamnoside was presentin B.purpurea, B. blakeana and B. variegatawhile Qurecitin-3-arbinoside was specific to B. racemosa.