1、 By what insects

Nepenthes is a kind of hermaphroditic plant. Pollination depends on two plants with gender differences. Generally, if in the wild, male plants account for 70%, and the rest are females. It usually pollinates through the wind, but the calyx of the floret will secrete nectar, which will attract some insects for pollination

2、 How to distinguish between male and female

To distinguish the male and female of pitcher grass, it is usually distinguished by stamens

1. Female flower: the female flower of pitcher has only one pistil, and the stigma is green and has a certain viscosity. This is how it sticks the pollen. Its calyx is very small, and the pistil is black and oval in shape. After its capsule grows and matures, it will crack, showing 4 petals and many seeds

2. Male flower: the male flower of pitcher also has a stamen, and its anther will have yellow pollen on it. It has four sepals, oval and oblong in shape, with a length of about 5-7cm