Wildflowers: ID Help

I would like to know the name of this wildflower
Location: central Arkansas
road ditch
sunny

height: 2-3 ft

flower small, yellow

left: closed flower
several flowers on stem

 

Looks like Ludwigia alternifolia.

 

thanks for the correct id, with the name i was able to double check with images on the web- and confirm- the seeds of this plant are eye catching -