Desmodium species- Munnar, Kerala

Plant for ID 16/12/09 SMP29 posts by 5 authors. Attachments (1)
Again a Fabaceae member at Munnar Dec2009.
For Id
Adding another picture probably of the same plant emerging through another bush.  Attachments (1)
Again a Fabaceae member at Munnar Dec2009
this is probably some species of Desmodium sp ......i forgot the species .. sorry for it .....i am also waiting to renew the knowledge.
Does a Desmodium have serrate margin?!
two plants mixed up here; the serrate leaved one is vegetative (Ageratum???); and the flowers belong to the trifoliolate leaves, perhaps Desmodium only, as told by ...
I hope this plant is Desmodium multiflorum DC. in Ann.Sci.Nat.Par.ser. 1.4:101. Jan. 1825. Ohashi in Univ. Tokyo Bull.2:272.1971; Ohashi l.c. 110.1973.
Does not match with images of Desmodium multiflorum DC. (as told by ...)