Oxalis tetraphylla

Physical Characteristics

Oxalis tetraphylla is a PERENNIAL growing to 0.1 m (0ft 4in) by 0.3 m (1ft). See above for USDA hardiness. It is hardy to UK zone 8 and is not frost tender. It is in flower from May to September. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil.

Distribution

Southern N. America - Mexico. Naturalized in Britain.

Habitats

Ground Cover; Cultivated Beds;

Edible Uses

Edible Parts: Flowers Leaves Root Edible Uses: Leaves - raw or cooked[105]. A pleasant acid flavour, though a little fibrous[K]. Use in moderation, see notes at top of sheet, Flowers - raw[K]. A dellightful acid flavour, they make an attractive addition to the salad bowl and are especially relished by children[K]. Root - cooked. Starchy but of poor quality[2, 105].

Medicinal Uses

None known

Known Hazards

The leaves contain oxalic acid, which gives them their sharp flavour. Perfectly all right in small quantities, the leaves should not be eaten in large amounts since oxalic acid can bind up the body's supply of calcium leading to nutritional deficiency. The quantity of oxalic acid will be reduced if the leaves are cooked. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition[238].