D. longiracemosa sp. nov. A. Inflorescence with leaf; B. Close-up of the inflorescence; C. Close-up of the inflorescence (close bud with brachyblast); D–F. Flowers (front and side view); G. Standard petal; H. Keel petal; I. Wing petal; J. Stamens; K. Pistil; L. Adaxial; M. Abaxial leaves; N. Pods; O. Seeds. Scale bars: 5 cm (A); 1 mm (B–K, O); 1 cm (L–N). Drawn by Yotsawate Sirichamorn (A, C, L–O) and Punvarit Boonprajan (B, D–K).