A beautiful shamrock with rich burgundy leaves each made up of three triangular leaflets giving a superb architectural form masses of white funnel45shaped flowers emerge throughout summer contrasting well with the dark foliage as with other sorrels the flowers open fully in sunlight and close when overcast oxalis triangularis 39burgundy wine39 is a stunning perennial for patio pots rock gardens exotic gardens and borders preferring a sunny sheltered position height 20cm 40