Oxalis dillenii or O. stricta

Common name: Yellow wood sorrel
Family: Oxalidaceae - wood sorrel family
Size: up to 40 cm tall
Description: Upright or sprawling`

 Flower:

• Up to 2.5 cm across
• 5 yellow petals
• 5 green sepals

Inflorescence

Axillary pedunculate Umbel of 2-9 florets

Flower stalk longer than leaves stalk

Pedicel erect in flower

Leaves and stem:

• Alternate, trifoliate leaves
• Long-stalked
• Leaflets obcordate mostly sessileLeaves close get it gets dark
• Stems solitary, usually much-branched at base and forming clumps

More information:

The whole plant is edible.  Leaves are high in vitamin C, but should not be eaten in excessive quantities.

This species and O. stricta are very difficult to distinguish. For more information click here and here.