After going through the revision, I agree with Ashutosh ji due to long ensiform falcate persistent stipules.
Here are the keys from the recent revision of Flemingia by Manoj Lekahak ji and others:
Key to the species of subg. Ostryodium
1. Leaflets ovate or linear-lanceolate, apex acute ... 2
1. Leaflets cordate, apex acuminate .....F. chappar
2. Erect shrubs ..... 3
2. Trailing shrubs ........F. fruticulosa
3. Bracts persistent ....... 4
3. Bracts caducous .......F. nudiflora
4. Plant tall up to 1.2–3.2 m in height; leaflets ovate with 12–20 mm long petiole, lateral veins 7-8(-10) pairs ...........F. strobilifera
4. Plant tall up to 0.8–1 m in height; leaflets linear-lanceolate with 2–4 mm long petiole, lateral veins 4-6 pairs .................. F. bracteata