Crotolaria assamica

Family: Fabaceae (alt. Leguminosae)

Common Name: Rattle Pod, Rattleweed

Origin: native, also found in China, Taiwan, Japan, Vietnam, Laos, Thailand, Myanmar, India. Usually found in roadsides or in fields

a member of the bean family Fabaceae
When the seed pod dries, the seeds rattle inside. Hence, names “Rattle Pod” and “Rattleweed”.
There are many kinds of Crotolaria with bright yellow flowers.
Similar species commonly found in the Philippines are Crotolaria retusa or Kalog-kalog, which has rounded leaves and Crotolaria quinquefolia or Suso-susoyan. Crotolaria quinquefolia has “palmately compound leaves of five leaflets” (stuartxchange.com).
ID from Lowell Aribal.