In article , Robert
writes
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.

Creeping buttercup doesn't have creeping roots. It spreads by runners
(stems) which root at intervals, in the same way as strawberries do.
Oxalis is the same.

--
Kay
"Do not insult the crocodile until you have crossed the river"