Sesbania procumbens

Sesbania procumbens (Roxb.) Wight & Arn. (Syn: Aeschynomene procumbens Roxb.);

India (Naturalised); Andhra Pradesh; Gujarat; Karnataka; Madhaya Pradesh; Maharashtra; Orissa; Rajasthan; Tamil Nadu as per ILDIS;

W. & A. Prodr. 215 ; annual, obscurely muricated, pod short flexible torulose not twisted. Dalz. & Gibs. Bomb. Fl. 62. AEschy- nomene procumbens, Roxb. Fl. Ind. iii. 337. AE. diffusa, Roxb. MSS.
Branches lower and more slender than in the last. Leaves 2-3 in. long ; leaflets 31-41, linear-oblong, glabrous, glaucous. Flowers solitary or geminate, without a common peduncle. Calyx 1/12 in. long. Corolla 3 times the calyx. Pod straight, 2-3 in. long, 1/12 in. thick, 15-20-seeded, distinctly torulose.
(From The Flora of British India Vol. 2 From IBIS Flora)
AR 17,2010: The plant is a metre high. Flower width 1.5 cm. Flowering now (Nov.) in wild at Chennai modified habitat. I checked with and Shrikant's book.The leaves resemble Aeschynomene indica while the flowers are more like Stylosanthes  fruiticosa. Of course I realize it may possibly be quite unrelated!  
Looks like Parkinsonia aculeata. Common Name: Jerusalem thorn,

It look like Aeschynomene. Is it grows in marshy or water logged areas?
Yes Aeschynomene
Aeschynomene only, we have also same genus in our area.
Aeschynomene indica L.
By mistake I  proposed the species to be Parkinsonia aculeata, as the photograph was deceiving. I stand corrected.
Absence of paired bracts rule out Aeschynomene india.
It looks like Sesbania procumbens
This is not Aeschynomene indica. Pl verify the flower shape and calyx. To me it looks like Sesbania procumbens.