|O. lobata is a clump forming perennial that has bright green leaves and blooms with large funnel shaped flowers of golden yellow, spotted with red. O. 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 about the rock garden, planted in sunny corners or in a trough.