My garden is full of what looks to me like Yellow Sorrel (Oxalis
corniculata) - by looking in books and the Internet. e.g.
http://www.ibiblio.org/herbmed/pictu...orniculata.htm

But all descriptions I have read say this plant has creeping roots (like
creeping buttercup) whereas mine all have a long, thin tap-root. The stems
spread quite far and flat against the ground. I don't know about the
flowers as I never let them grow that far.

Can anyone clarify this and give me a name?

Robert