I am in west Houston.
The lawns here have weeds that look like chickweed
except the flowers are yellow instead of white.

This is the plant but with yellow flowers:
http://urbanfringe.files.wordpress.c.../chickweed.jpg

IT IS NOT OXALIS !!!
It must be a species of chickweed but cannot find any pics
with yellow flowers.

Any ideas what it could be?

Thanks,
Paul