In Henan, there is a wild plant, commonly known as poplar milk or yanggu milk in Nanyang. It grows in the weeds on the side of the road, with a long circle in the middle, with two sharp ends like.

According to your description, this plant may be Populus × canadensis, also known as Populus canadensis, Populus euramericana, a deciduous tree of Populus saliciferae, which is common on roadsides, parks and streets. Poplar is widely planted in Henan, and it is also one of the common urban greening trees.

The common name of poplar in Nanyang area may be "poplar milk" or "yanggu milk", which may be named because the fruit looks like breast or cheese. It is worth noting that this plant may also be called "acacia" or "Sophora japonica" in some areas, but they are actually different plants.

If you want to know more about this plant, you can refer to relevant botanical materials or consult a local botanist.