It has intended to identify the members of the Genus Lespedeza in Korea by a chemical colour reaction, and the following five species of the Genus Lespedeza grown in the garden have been used in this experiment. 1. Lespedeza bicolor Turcz 2. Lespedeza bicolor var. melanantha (Nak.) T. Lee 3. Lespedeza cyrtobotrya Miq. 4. Lespedeza japonica var. intermedia Nakai 5. Lespedeza maritima Nakai 6. Lespedeza maximowiczii Schneider 7. Lespedeza maximowiczii var. tomentella Nakai A few drops of each solution of K₂Cr₂O_r. Fe SO₄·7H₂O, Fe Cl₃, KH₂OO₄, KMnO₄, NH₄OH, and HCl was added to the methanol extracts of wood dust to get the specific colour reaction. HCl-infused wood was also used for the identification of L. bicolor var. melanantha and L. bicolor. The results can be summarized as the following key; 1. Chrome lemon by K₂Cr₂O_7 = 2 1. Sun flower yellow by K₂Cr₂O_7 == Lespedeza maximowiczii var. tomentella Nakai 2. KH₂PO₄ System white by KH₂PO₄; golden yellow by FeCl₃ = 3 2. Cream colour by KH₂PO₄ = 6 3. Oyster white by NH₄OH; corn colour by FeSO₄·7H₂O = 4 3. Cream colcur by NH₄OH = 5 4. Van dyke brown by KMnO₄; sea shell pink by HCl injection under heating == Lespedeza japonica var. intermedia Nakai 4. Sepia colour by KMnO₄; honey colour by HCl injection under heating == Lespedeza maritima Nakai 5. Golden red by FeSO₄·7H₂O; andover green by HCl-infused wood dust == Lespedeza bicolor var. melanantha (Nak.) T. Lee 5. Yellow ochre by FeSo₄·7H₂O; sand warm gray by HCl-infused wood dust == Lespedeza bicolor Turcz 6. Amber green by FeCl₃ == Lespedeza cyrtobotrya Miq. 6. Leather brown by FeCl₃ == Lespedeza maximowiczii Schneider