A Complete Guide to the Characteristics and Traditional Uses of Poplar Bark

Poplar bark is the dried bark of poplar trees in the genus Populus of the willow family Salicaceae, and the medicinal source is mainly common poplars such as the Chinese white poplar (Populus tomentosa). The poplar trunk is tall and straight, and the bark of young trees is grayish green or grayish white, with a smooth surface dotted with diamond-shaped lenticels, which is an intuitive feature by which people identify poplars from a distance.

As the tree ages, poplar bark changes noticeably: the old bark near the base becomes rough and thick, turns dark gray or even blackish brown, and develops longitudinal cracks of varying depth, while the bark on the upper trunk and branches remains relatively smooth. Bark is usually harvested in the season when sap flow is vigorous, and after being stripped off it can be sun-dried for long-term storage.

In terms of traditional applications, poplar bark has long been used in folk practice to clear heat and dispel wind and to relieve rheumatic discomfort, and in some places it is decocted and applied externally; specific use should follow professional guidance, and long-term self-administration is not recommended. It is worth noting that the bark of plants in the genus Populus contains natural compounds such as salicin, which is why willow bark and poplar bark have historically been used to relieve pain.

It should be noted that there are many species in the genus Populus, and the bark of different species looks similar, making it difficult for ordinary readers to identify accurately; if collecting for medicinal purposes, one should first consult a professional. When growing poplars day to day, the condition of the bark can also reflect tree vigor, and if large areas of cracking or abnormal shedding appear, attention should be paid promptly to the tree's health.