oxalis tetraphylla

Oxalis tetraphylla (often still traded under its syn. O. deppei) is a bulbous plant from Mexico. A common name is 'Iron Cross', after a famous cultivar; it is also known as 'lucky clover', and in a wild or feral state as four-leaf sorrel or, least ambiguously, four-leaved pink-sorrel.

It has leaves divided into four and has been called 'lucky leaf' and even 'four-leaf clover', but it is not a true clover. Related to the common wood-sorrel (Oxalis acetosella), it is commonly used as an ornamental ...