Honeysuckle flower (Lonicera japonica, Flos Lonicerae Japonicae, Chinese: 銀花, Pinyin: Jin Yin Hua)
Japanese honeysuckle is an invasive vine that is predominantly found in Asia, but you can find it in other parts of the world due to its invasive nature. Chances are you could find at least one species of honeysuckle in the country you live in. Do be careful as I don’t know whether all of them have medicinal benefits.
The flowers of this plant are quite rare as there are not that many present on the plant and they shrink upon drying. That’s why you can expect the price of this herb to be somewhere between 3-6 USD per 50 g/1.76 oz.
Honeysuckle flowers are a staple of Chinese medicine, not to mention they are very well-researched and edible. Don’t confuse it with Ren Dong Teng (Caulis Lonicerae), which is the stem of the japanese honeysuckle.