EmilyCoyte's picture

Reddish three leaved weed

Observed: 15th July 2011 By: EmilyCoyteEmilyCoyte’s reputation in Plants
Unknown trefoil weed - small yellow flower

What is this trefoil weed found in our veg garden? It has a tiny yellow flower on a fairly tall stalk

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EmilyCoyte's picture

thanks but...

thanks for that!

I'd like to know what causes the reddish tinge to it? Some photos show the upright yellow sorrel to have green leaves and others to have red or reddish leaves. Is it something to do with the soil?


Come forth into the light of things, let nature be your teacher.

William Wordsworth

Tiggrx's picture

The reddish coloration is

The reddish coloration is caused by anthocyanins within the plant tissues http://en.wikipedia.org/wiki/Anthocyanin

This variety of the plant (var. rufa) always has this colouring while the usual green leaved form is var. stricta. Similarly there are both green and purple leaved forms of the Procumbent Yellow-sorrel (Oxalis corniculata).