Oxalis corniculata

Oxalis corniculata

Observation - Oxalis corniculata - UK and Ireland. Description: Tiny, low-growing little rascal, spreading by lax stems which root themselves along their length. Pretty trefoil leaves, not as folded as those of wood sorrel (O.acetosella) and purple, instead of green. The purple colour of leaves and stems make

Tiny, low-growing little rascal, spreading by lax stems which root themselves along their length.

Pretty trefoil leaves, not as "folded" as those of wood sorrel (O.acetosella) and purple, instead of green.

The purple colour of leaves and stems make it cunningly invisible against the soil until it flowers (shocking bright yellow) at which point it's too late to start weeding it out, as it has spread for yards.

Actually "observed" growing in the pavement, not exactly garden or park; but they are opportunistic and will grow anywhere that they can.