Interaction between Bees and the Tristylous Flowers of Oxalis cytisoides Mart. & Zucc. (Oxalidaceae)

Figure 1

Scheme of Oxalis cytisoides Zucc flower morphology. L: long-styled flower with medium and short filaments. M: mid-styled flower with short and long filaments. S: short-styled flower with medium and long filaments. The arrows indicate the legitimate cross-pollination, according to the system of the heretostyly plants.