Some of you will look at this delicate oxalis flower and smile. Some of you will put your head in your hands and rock gently whilst quietly moaning. I am of the latter persuasion. Today I have spent a fair proportion of my time digging this little monster up. It grows rampant in the shadier back of border, as befits a wood sorrel. Do not be fooled by its fine features. Spreading by way of fine rhizomes just below the surface, it punches with a velvet glove. The slim white threads are brittle and it is nigh on impossible to remove them all. Those who believe they can will be sorely disappointed. Naturally it will return, but hopefully a little chastened. And when I’ve had a chance to recover.