A diagram overtop a cross-section of an Oxalis pes-caprae flower. Each part of the flower has a label. On the left says "Anthers" and points to two layers of anthers (one at the top of the flowe and one at the bottom). On the right it says "petals", "stigmas" "style" and "sepals".

A series of three photos showing cross-sections of Oxalis pes-caprae flowers. The first image shows the short-styled morph. The middle is the mid-style morph and the last is the long-styled morph.

#Oxalis pes-caprae, a plant with a unique feature called #heterostyly. This is a floral polymorphism where individuals in a species have variation in the position of their reproductive organs (specifically stigma and stamen). Oxalis pes-caprae is #tristylous, meaning it has three floral morphs.