|O. adenophylla, has a bulbous rootstock that has crinkled grey-green, fan shaped foliage with goblet shaped, creamy pink flowers in late spring. Oxalis is a genus of about 800 species. Many are tuberous, the leaves are usually three-lobed and clover-like. Both the leaves and flowers close up in dull weather and at night. May be used in the rock garden, planted in sunny corners or in a trough.